diff --git a/src/component/Admin/Index.js b/src/component/Admin/Index.js
index 91a328b..988c859 100644
--- a/src/component/Admin/Index.js
+++ b/src/component/Admin/Index.js
@@ -182,7 +182,12 @@ export default function Index() {
                 setNewsUsers(res);
             })
             .catch((error) => {
-                ToggleSnackbar("top", "right", error.message, "error");
+                ToggleSnackbar(
+                    "top",
+                    "right",
+                    "Cloudreve 公告加载失败",
+                    "warning"
+                );
             });
     }, []);
 
diff --git a/src/component/Admin/Setting/Captcha.js b/src/component/Admin/Setting/Captcha.js
index 72212ae..abb39db 100644
--- a/src/component/Admin/Setting/Captcha.js
+++ b/src/component/Admin/Setting/Captcha.js
@@ -12,6 +12,8 @@ import MenuItem from "@material-ui/core/MenuItem";
 import Input from "@material-ui/core/Input";
 import Link from "@material-ui/core/Link";
 import { toggleSnackbar } from "../../../redux/explorer";
+import FormControlLabel from "@material-ui/core/FormControlLabel";
+import Switch from "@material-ui/core/Switch";
 
 const useStyles = makeStyles((theme) => ({
     root: {
@@ -40,7 +42,14 @@ export default function Captcha() {
         captcha_height: "1",
         captcha_width: "1",
         captcha_mode: "3",
-        captcha_CaptchaLen: "",
+        captcha_CaptchaLen: "6",
+        captcha_ComplexOfNoiseText: "0",
+        captcha_ComplexOfNoiseDot: "0",
+        captcha_IsShowHollowLine: "0",
+        captcha_IsShowNoiseDot: "0",
+        captcha_IsShowNoiseText: "0",
+        captcha_IsShowSlimeLine: "0",
+        captcha_IsShowSineLine: "0",
         captcha_ReCaptchaKey: "",
         captcha_ReCaptchaSecret: "",
         captcha_TCaptcha_CaptchaAppId: "",
@@ -100,6 +109,14 @@ export default function Captcha() {
             });
     };
 
+    const handleCheckChange = (name) => (event) => {
+        const value = event.target.checked ? "1" : "0";
+        setOptions({
+            ...options,
+            [name]: value,
+        });
+    };
+
     return (
         <div>
             <form onSubmit={submit}>
@@ -178,6 +195,25 @@ export default function Captcha() {
                                 </FormControl>
                             </div>
 
+                            <div className={classes.form}>
+                                <FormControl>
+                                    <InputLabel htmlFor="component-helper">
+                                        长度
+                                    </InputLabel>
+                                    <Input
+                                        type={"number"}
+                                        inputProps={{
+                                            min: 1,
+                                            step: 1,
+                                        }}
+                                        value={options.captcha_CaptchaLen}
+                                        onChange={handleChange(
+                                            "captcha_CaptchaLen"
+                                        )}
+                                        required
+                                    />
+                                </FormControl>
+                            </div>
                             <div className={classes.form}>
                                 <FormControl>
                                     <InputLabel htmlFor="component-helper">
@@ -200,6 +236,55 @@ export default function Captcha() {
                                     </FormHelperText>
                                 </FormControl>
                             </div>
+                            {[
+                                {
+                                    name: "加强干扰文字",
+                                    field: "captcha_ComplexOfNoiseText",
+                                },
+                                {
+                                    name: "加强干扰点",
+                                    field: "captcha_ComplexOfNoiseDot",
+                                },
+                                {
+                                    name: "使用空心线",
+                                    field: "captcha_IsShowHollowLine",
+                                },
+                                {
+                                    name: "使用噪点",
+                                    field: "captcha_IsShowNoiseDot",
+                                },
+                                {
+                                    name: "使用干扰文字",
+                                    field: "captcha_IsShowNoiseText",
+                                },
+                                {
+                                    name: "使用波浪线",
+                                    field: "captcha_IsShowSlimeLine",
+                                },
+                                {
+                                    name: "使用正弦线",
+                                    field: "captcha_IsShowSineLine",
+                                },
+                            ].map((input) => (
+                                <div key={input.name} className={classes.form}>
+                                    <FormControl fullWidth>
+                                        <FormControlLabel
+                                            control={
+                                                <Switch
+                                                    checked={
+                                                        options[input.field] ===
+                                                        "1"
+                                                    }
+                                                    onChange={handleCheckChange(
+                                                        input.field
+                                                    )}
+                                                />
+                                            }
+                                            label={input.name}
+                                        />
+                                    </FormControl>
+                                </div>
+                            ))}
                         </div>
                     </div>
                 )}
diff --git a/src/component/Admin/Setting/Image.js b/src/component/Admin/Setting/Image.js
index 98dfbba..e6a81cc 100644
--- a/src/component/Admin/Setting/Image.js
+++ b/src/component/Admin/Setting/Image.js
@@ -10,6 +10,9 @@ import { useDispatch } from "react-redux";
 import { toggleSnackbar } from "../../../redux/explorer";
 import API from "../../../middleware/Api";
 import SizeInput from "../Common/SizeInput";
+import Alert from "@material-ui/lab/Alert";
+import FormControlLabel from "@material-ui/core/FormControlLabel";
+import Switch from "@material-ui/core/Switch";
 
 const useStyles = makeStyles((theme) => ({
     root: {
@@ -43,6 +46,11 @@ export default function ImageSetting() {
         thumb_width: "",
         thumb_height: "",
         office_preview_service: "",
+        thumb_file_suffix: "",
+        thumb_max_task_count: "",
+        thumb_encode_method: "",
+        thumb_gc_after_gen: "0",
+        thumb_encode_quality: "",
     });
 
     const handleChange = (name) => (event) => {
@@ -96,6 +104,14 @@ export default function ImageSetting() {
             });
     };
 
+    const handleCheckChange = (name) => (event) => {
+        const value = event.target.checked ? "1" : "0";
+        setOptions({
+            ...options,
+            [name]: value,
+        });
+    };
+
     return (
         <div>
             <form onSubmit={submit}>
@@ -215,43 +231,6 @@ export default function ImageSetting() {
                     </Typography>
 
                     <div className={classes.formContainer}>
-                        <div className={classes.form}>
-                            <FormControl>
-                                <InputLabel htmlFor="component-helper">
-                                    缩略图宽度
-                                </InputLabel>
-                                <Input
-                                    type={"number"}
-                                    inputProps={{
-                                        min: 1,
-                                        step: 1,
-                                    }}
-                                    value={options.thumb_width}
-                                    onChange={handleChange("thumb_width")}
-                                    required
-                                />
-                            </FormControl>
-                        </div>
-                    </div>
-
-                    <div className={classes.formContainer}>
-                        <div className={classes.form}>
-                            <FormControl>
-                                <InputLabel htmlFor="component-helper">
-                                    缩略图高度
-                                </InputLabel>
-                                <Input
-                                    type={"number"}
-                                    inputProps={{
-                                        min: 1,
-                                        step: 1,
-                                    }}
-                                    value={options.thumb_height}
-                                    onChange={handleChange("thumb_height")}
-                                    required
-                                />
-                            </FormControl>
-                        </div>
                         <div className={classes.form}>
                             <FormControl>
                                 <InputLabel htmlFor="component-helper">
@@ -277,6 +256,155 @@ export default function ImageSetting() {
                     </div>
                 </div>
 
+                <div className={classes.root}>
+                    <Typography variant="h6" gutterBottom>
+                        缩略图
+                    </Typography>
+
+                    <div className={classes.formContainer}>
+                        <div className={classes.form}>
+                            <Alert severity="info">
+                                以下设置只针对本机存储策略有效。
+                            </Alert>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl>
+                                <InputLabel htmlFor="component-helper">
+                                    缩略图宽度
+                                </InputLabel>
+                                <Input
+                                    type={"number"}
+                                    inputProps={{
+                                        min: 1,
+                                        step: 1,
+                                    }}
+                                    value={options.thumb_width}
+                                    onChange={handleChange("thumb_width")}
+                                    required
+                                />
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl>
+                                <InputLabel htmlFor="component-helper">
+                                    缩略图高度
+                                </InputLabel>
+                                <Input
+                                    type={"number"}
+                                    inputProps={{
+                                        min: 1,
+                                        step: 1,
+                                    }}
+                                    value={options.thumb_height}
+                                    onChange={handleChange("thumb_height")}
+                                    required
+                                />
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl>
+                                <InputLabel htmlFor="component-helper">
+                                    缩略图文件后缀
+                                </InputLabel>
+                                <Input
+                                    type={"text"}
+                                    value={options.thumb_file_suffix}
+                                    onChange={handleChange("thumb_file_suffix")}
+                                    required
+                                />
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl>
+                                <InputLabel htmlFor="component-helper">
+                                    缩略图生成并行数量
+                                </InputLabel>
+                                <Input
+                                    type={"number"}
+                                    inputProps={{
+                                        min: -1,
+                                        step: 1,
+                                    }}
+                                    value={options.thumb_max_task_count}
+                                    onChange={handleChange(
+                                        "thumb_max_task_count"
+                                    )}
+                                    required
+                                />
+                                <FormHelperText id="component-helper-text">
+                                    -1 表示不限制
+                                </FormHelperText>
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl>
+                                <InputLabel htmlFor="component-helper">
+                                    缩略图格式
+                                </InputLabel>
+                                <Input
+                                    type={"test"}
+                                    value={options.thumb_encode_method}
+                                    onChange={handleChange(
+                                        "thumb_encode_method"
+                                    )}
+                                    required
+                                />
+                                <FormHelperText id="component-helper-text">
+                                    可选：png/jpg
+                                </FormHelperText>
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl>
+                                <InputLabel htmlFor="component-helper">
+                                    缩略图生成并行数量
+                                </InputLabel>
+                                <Input
+                                    type={"number"}
+                                    inputProps={{
+                                        min: 1,
+                                        step: 1,
+                                        max: 100,
+                                    }}
+                                    value={options.thumb_encode_quality}
+                                    onChange={handleChange(
+                                        "thumb_encode_quality"
+                                    )}
+                                    required
+                                />
+                                <FormHelperText id="component-helper-text">
+                                    压缩质量百分比，只针对 jpg 编码有效
+                                </FormHelperText>
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl fullWidth>
+                                <FormControlLabel
+                                    control={
+                                        <Switch
+                                            checked={
+                                                options.thumb_gc_after_gen ===
+                                                "1"
+                                            }
+                                            onChange={handleCheckChange(
+                                                "thumb_gc_after_gen"
+                                            )}
+                                        />
+                                    }
+                                    label="生成完成后立即回收内存"
+                                />
+                            </FormControl>
+                        </div>
+                    </div>
+                </div>
+
                 <div className={classes.root}>
                     <Button
                         disabled={loading}
diff --git a/src/component/Admin/Setting/UploadDownload.js b/src/component/Admin/Setting/UploadDownload.js
index 563602b..7577cde 100644
--- a/src/component/Admin/Setting/UploadDownload.js
+++ b/src/component/Admin/Setting/UploadDownload.js
@@ -40,7 +40,7 @@ export default function UploadDownload() {
         max_parallel_transfer: "1",
         temp_path: "",
         maxEditSize: "0",
-        onedrive_chunk_retries: "0",
+        chunk_retries: "0",
         archive_timeout: "0",
         download_timeout: "0",
         preview_timeout: "0",
@@ -57,6 +57,7 @@ export default function UploadDownload() {
         slave_ping_interval: "0",
         slave_recover_interval: "0",
         slave_transfer_timeout: "0",
+        use_temp_chunk_buffer: "1",
     });
 
     const handleCheckChange = (name) => (event) => {
@@ -142,7 +143,7 @@ export default function UploadDownload() {
                                     required
                                 />
                                 <FormHelperText id="component-helper-text">
-                                    任务队列最多并行执行的任务数，保存后需要重启
+                                    主机节点任务队列最多并行执行的任务数，保存后需要重启
                                     Cloudreve 生效
                                 </FormHelperText>
                             </FormControl>
@@ -182,7 +183,7 @@ export default function UploadDownload() {
                                     required
                                 />
                                 <FormHelperText id="component-helper-text">
-                                    用于存放打包下载、解压缩、压缩等任务产生的临时文件的目录路径
+                                    用于存放解压缩、压缩等任务产生的临时文件的目录路径
                                 </FormHelperText>
                             </FormControl>
                         </div>
@@ -206,7 +207,7 @@ export default function UploadDownload() {
                         <div className={classes.form}>
                             <FormControl>
                                 <InputLabel htmlFor="component-helper">
-                                    OneDrive 分片错误重试
+                                    分片错误重试
                                 </InputLabel>
                                 <Input
                                     type={"number"}
@@ -214,15 +215,35 @@ export default function UploadDownload() {
                                         min: 0,
                                         step: 1,
                                     }}
-                                    value={options.onedrive_chunk_retries}
-                                    onChange={handleChange(
-                                        "onedrive_chunk_retries"
-                                    )}
+                                    value={options.chunk_retries}
+                                    onChange={handleChange("chunk_retries")}
                                     required
                                 />
                                 <FormHelperText id="component-helper-text">
-                                    OneDrive
-                                    存储策略分片上传失败后重试的最大次数，只适用于服务端上传或中转
+                                    分片上传失败后重试的最大次数，只适用于服务端上传或中转
+                                </FormHelperText>
+                            </FormControl>
+                        </div>
+
+                        <div className={classes.form}>
+                            <FormControl fullWidth>
+                                <FormControlLabel
+                                    control={
+                                        <Switch
+                                            checked={
+                                                options.use_temp_chunk_buffer ===
+                                                "1"
+                                            }
+                                            onChange={handleCheckChange(
+                                                "use_temp_chunk_buffer"
+                                            )}
+                                        />
+                                    }
+                                    label="缓存流式分片文件以用于重试"
+                                />
+                                <FormHelperText id="component-helper-text">
+                                    开启后，流式中转分片上传时会将分片数据缓存在系统临时目录，以便用于分片上传失败后的重试；
+                                    关闭后，流式中转分片上传不会额外占用硬盘空间，但分片上传失败后整个上传会立即失败。
                                 </FormHelperText>
                             </FormControl>
                         </div>
@@ -273,10 +294,6 @@ export default function UploadDownload() {
                                 name: "Office 文档预览连接",
                                 field: "doc_preview_timeout",
                             },
-                            {
-                                name: "上传凭证",
-                                field: "upload_credential_timeout",
-                            },
                             {
                                 name: "上传会话",
                                 field: "upload_session_timeout",