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发现文件丢失后，你的第一反应决定了后续恢复的可能性。请按顺序完成下面 3 件事：Your first reaction after discovering file loss determines your recovery chances. Follow these 3 steps in order:

1. 停止对源盘的任何写入1. Stop All Writes to the Source Drive

删除文件后，其占用的磁盘空间被标记为「可覆写」。任何新文件、缓存、下载、软件安装都可能覆盖这些空间——一旦被覆盖，数据就无法找回。此时不要重启电脑（系统可能写入日志），不要向该磁盘复制任何内容。After deletion, the disk space is marked as "overwritable." Any new file, cache, download, or software install may overwrite it — once overwritten, data is unrecoverable. Do not restart (the OS may write logs) and do not copy anything to that drive.

2. 先做磁盘镜像，再在镜像上操作2. Create a Disk Image First

用复得的「磁盘镜像」功能把源盘完整复制为镜像文件（支持 RAW 格式、gzip 压缩、坏扇区跳过、断点续做，并有 MD5+SHA-256 双重校验）。之后所有扫描和恢复都在镜像上进行，源盘零风险——即使操作失误，随时可以重来。Use Fude's "Disk Image" feature to create a full copy (RAW, gzip, bad sector skip, resume, MD5+SHA-256 verification). All scans and recovery run on the image — the source is risk-free, and you can retry anytime.

3. 免费扫描，先看再买3. Free Scan, Preview Before Purchase

复得的完整磁盘扫描免费且不限次数。扫描后可以预览可恢复文件（视频支持前 3 秒预览），确认能找到什么，再决定是否购买授权码导出。每月还有 1GB 免费导出额度。Fude's full disk scan is free and unlimited. Preview recoverable files (videos: 3-second preview), confirm what's found, then decide whether to purchase. Free export: 1GB/month.

很多人以为「清空回收站 = 文件彻底消失」，其实不是。这要从文件系统怎么「删除」说起：Many think "emptying the recycle bin = files gone forever." Not quite. Let's look at how file systems actually "delete" files:

删除 ≠ 抹掉数据Deletion ≠ Erasing Data

在 NTFS 等文件系统中，删除文件通常只是：① 在目录/索引中移除该文件条目；② 把其占用的簇标记为「空闲」。数据本身仍原样躺在磁盘上，直到被新数据覆盖。所以「刚删除/刚清空回收站」是恢复成功率最高的窗口期。In NTFS and similar file systems, deletion typically means: ① removing the file entry from the directory/index; ② marking its clusters as "free." The data itself remains on disk until overwritten. So "just deleted / just emptied" is the best window for recovery.

格式化呢？What About Formatting?

格式化（快速格式化）会重建文件系统结构（分区表、索引），但同样不会擦除所有数据簇。深度签名扫描不依赖文件系统——它直接逐扇区扫描磁盘，通过文件头签名（如视频的 MP4/AVI、图片的 JPEG/PNG、压缩包的 RAR/ZIP 等）定位真实存在的文件，所以即使格式化过，仍有找回的可能。Quick formatting rebuilds the file system structure (partition table, index) but doesn't erase all data clusters. Deep signature scan doesn't rely on the file system — it scans sector by sector, locating files by header signatures (MP4/AVI for video, JPEG/PNG for images, RAR/ZIP for archives), so recovery is still possible even after formatting.

什么情况下真的找不回来了？When Is Data Truly Unrecoverable?

• SSD 开启了 TRIM（删除后数据被物理擦除）；SSD with TRIM enabled (data physically erased after deletion).
• 全盘加密（BitLocker/FileVault）且没有密钥；Full-disk encryption (BitLocker/FileVault) without the key.
• 数据已被大量新数据覆写；Data extensively overwritten by new data.
• 介质物理损坏（坏道、烧毁、进水）。Physical media damage (bad sectors, fire, water).

恢复出来的视频打不开，先别急着删——按下面三步排查，多数情况能救回来：Recovered video won't open? Don't delete it yet — follow these three steps, and most can be saved:

第一步：检查是不是「扩展名伪装」Step 1: Check for Extension Spoofing

有时候文件内容其实是视频，但扩展名被改成了 .pdf、.txt 等，系统就会用错误程序打开。用「扩展名伪装检测」自动比对扩展名与文件头签名，识别被伪装的异常文件，并恢复真实类型。Sometimes the file content is actually a video, but the extension was changed to .pdf, .txt, etc., causing the system to open it with the wrong program. Use "Extension Spoofing Detection" to automatically compare extensions with file headers, identify spoofed files, and restore the true type.

第二步：用深度签名扫描重新定位Step 2: Relocate with Deep Signature Scan

如果文件头丢失或损坏，常规文件系统看不到它，但视频数据可能还在磁盘上。深度签名扫描通过视频特征（如 MP4 的 ftyp 头、AVI 的 RIFF 头）直接定位，即使索引丢失也能把数据找出来。If the header is missing or corrupted, the file system can't see it, but video data may still be on disk. Deep signature scan locates files by video signatures (e.g., MP4 ftyp, AVI RIFF) — even without an index, the data can be found.

第三步：免费筛查 + 视频修复 + 专业播放器Step 3: Free Triage + Video Repair + Professional Player

建议先用免费的「视频挽救筛查」做个只读评估：它会分析视频数据特征，给出「修复把握大 / 可尝试挽救 / 修复希望小」的分级，还能识别加密盘雕刻出的无效文件，支持整个文件夹批量筛查。MP4/MOV/AVI/MKV/FLV/3GP/MPEG-TS 等 20 多种格式的文件头、索引（如 moov 块）损坏或尾部截断时，「视频修复」会自动重建容器结构，严重损坏的还能从残缺数据中深度提取视频流重新封装，修复后可用常规播放器播放；修复前，也可以用「专业播放器」逐帧预览损坏视频，自动跳过损坏区域，先确认画面内容再决定是否修复。Start with the free "Video Triage" for a read-only assessment: it analyzes video data characteristics and grades recoverability (High chance / Worth trying / Unlikely), identifies invalid files carved from encrypted drives, and supports batch folder scanning. For 20+ formats (MP4/MOV/AVI/MKV/FLV/3GP/MPEG-TS), "Video Repair" automatically rebuilds container structures when headers, indexes (e.g., moov atom), or tails are damaged; severely corrupted files get deep stream extraction and repackaging for standard player playback. Before repairing, use the "Professional Player" for frame-by-frame preview with auto-skip of damaged regions.

十几年前的压缩包密码想不起来了？先别放弃，按顺序尝试：Can't remember the password for an archive from years ago? Don't give up — try in this order:

1. 尝试自己常用的密码1. Try Your Common Passwords

复得内置万级常用密码库，覆盖常见弱密码与高频口令。免费版可尝试 Top 100，付费版解锁完整密码库。Fude has a built-in password dictionary with tens of thousands of common weak passwords. Free version: Top 100. Paid version: full dictionary.

2. 用「密码生成器」组合回忆线索2. Use the Password Generator to Combine Clues

大多数人的密码都和个人信息相关。输入你的生日、姓名拼音、电话号码，复得会自动组合生成候选密码列表（如姓名+生日、电话后 6 位+字母等），逐条尝试。Most passwords relate to personal info. Enter your birthday, name pinyin, phone number — Fude auto-generates candidate passwords (e.g., name+birthday, last 6 digits+letters) and tries them one by one.

3. 认清边界3. Understand the Limits

密码破解的可行性取决于加密强度：ZIP 传统加密（ZipCrypto）较易；RAR5 / AES-256 等强加密在密码无规律时可尝试空间极大，可能无法在合理时间内完成——复得会如实告知可行性，不承诺必然破解。同时请注意：本功能仅限用于恢复您本人所有或经授权访问的数据，未经授权破解他人加密资料属于违法行为。Feasibility depends on encryption: ZIP traditional (ZipCrypto) is easier; RAR5/AES-256 with random passwords have enormous search spaces and may not complete in reasonable time — Fude reports feasibility honestly and does not guarantee success. Note: this feature is only for recovering your own data or data you're authorized to access. Unauthorized cracking is illegal.