What to do right now
- A completed full format in Windows Vista, 7, 8, 10 or 11 overwrites every sector of the volume with zeros.
- Confirm it was a full format and that it ran to the end before you give up.
- Look for copies in backups, cloud storage, other devices and the PC's own caches.
What you can still check
Confirm which format it was
A quick format finishes in seconds. A full format reads and writes the entire volume and takes minutes on a small stick and hours on a large hard drive. If Quick Format was unticked, or the format command was used without /q, it was a full format.
Check whether it finished
If the full format was cancelled or interrupted, only the part it had reached is zeroed. Data further along the volume may survive and can sometimes be found by signature search, without names.
Consider which tool formatted the drive
The zero-writing behaviour belongs to Windows Vista and later. A full format in Windows XP only checked for bad sectors. Cameras, other operating systems and some formatting tools may not overwrite the data either, so a scan is worth trying in those cases.
Run one scan to confirm
Open Deleted file recovery and run the Deep signature scan on the drive. If FileFix Ultimate finds only results that consist of zeros and marks them as likely unrecoverable, that confirms the data was overwritten. Do not spend days on repeated scans after that.
Look for copies elsewhere
Check OneDrive, Google Drive or iCloud, including their recycle bins, external backup drives, phones, email attachments and other PCs. On the PC that used the drive, the unsaved file finder can look for Office AutoRecover and temporary copies, and the thumbnail cache may still hold small previews of photos.
Quick format and full format, precisely
A quick format writes a new boot sector, a new allocation table and an empty root folder, and leaves the rest of the volume alone. That is why recovery after a quick format often works. Since Windows Vista, a full format additionally writes zeros to every sector of the volume and checks for bad sectors, as Microsoft has documented. The old content is replaced, not hidden.
Before Vista, a full format only read the sectors to look for errors, which is why older advice says full formats can be recovered. That advice does not apply to current Windows. The format command can also be told to write extra passes with the /p option, which makes no difference to the result: one pass of zeros is already enough.
Why a laboratory cannot reverse it either
There is a persistent idea that specialist equipment can read data underneath an overwrite. For modern high-density hard drives, a single overwrite is widely regarded as sufficient to prevent recovery, and media sanitisation guidelines treat it that way for most drives. Professional data recovery services are valuable for drives with physical damage, but they cannot restore sectors that were overwritten, and reputable ones will usually tell you so after an evaluation.
What a full format does not touch
A full format only affects the volume that was formatted. Other partitions on the same disk are untouched, as are any copies on other devices. Windows also keeps traces on the system drive: thumbnails of photos you viewed in Explorer, AutoRecover files from Office, recent documents and sometimes temporary copies. These are rarely complete, but a low-resolution preview of a lost photo or an older draft of a document is better than nothing.
On an SSD the situation is usually worse, not better. Even a quick format typically sends TRIM for the whole volume, and the drive then erases the blocks itself. Memory cards formatted in a camera usually get a quick format, but some cards and tools offer an overwrite format that behaves like a full format.
When nothing can be recovered
- A full format in Windows Vista or later ran to completion on the volume.
- The drive is an SSD and TRIM was applied after the format.
- The files existed only on that volume and were never opened, synced or backed up elsewhere.
- The drive was formatted with an overwrite option or a secure erase tool.
How FileFix Ultimate helps
- Marks results that contain only zeros as likely unrecoverable instead of saving empty files, so you get a clear answer.
- Scans the other partitions of the disk and disk images read-only, in case the files also lived elsewhere.
- Recovers low-resolution photo previews from the Windows thumbnail cache when the originals are gone.
- The unsaved file finder searches Office AutoRecover folders, temporary files and other recovery copies on the system drive.
- Free for personal use with no recovery limit, so confirming the situation costs you nothing.
FileFix Ultimate is free for personal use, works offline and never writes to the drive you are recovering from. Business use needs a one-year licence per PC. Check the signature before you run it.
Frequently asked questions
How can I tell whether my format was quick or full?
Think about how long it took. Seconds means quick; minutes or hours means full. In Windows, Quick Format is ticked by default, so unless you unticked it or used the format command without /q, it was most likely quick.
Can a professional recovery lab get data back after a full format?
Not if Windows Vista or later completed the full format. Labs can help with physically damaged drives, but they cannot read data that has been overwritten with zeros.
I did a full format on Windows XP or with another tool. Is there a chance?
Possibly. Windows XP did not overwrite data during a full format, and some other tools do not either. Run the Balanced scan and the Deep signature scan before drawing conclusions.
Is it worth scanning at all after a full format?
One scan is worth it to confirm what happened, especially if you are unsure whether the format finished. If the results are all zeros, stop and put your effort into finding copies elsewhere.