Honest limitations of data recovery

SSDs and TRIM

When you delete a file on an SSD, Windows usually sends a TRIM command that tells the drive the blocks are free. The SSD then erases them in the background, often within seconds or minutes. After that, the data is gone. Recovery from SSDs works mostly when TRIM was disabled, the drive is connected over certain USB adapters, or the file was deleted moments ago.

Overwritten data

Deleting a file only marks its space as free. As soon as new data is written there — a download, an update, a browser cache — the old content is replaced. That is why you should stop using the drive immediately and never install recovery software on it.

Encrypted drives

BitLocker and other encryption make data unreadable without the key. If you have the password or the 48-digit recovery key, unlock the drive first and then scan it. Without the key, recovery is not possible.

Physical damage

Clicking, grinding or beeping sounds, a drive that is not detected, or one that keeps disconnecting are signs of hardware failure. Running a scan forces the drive to work hard and can destroy what is left. Power it off and contact a professional data recovery lab with a clean room.

Fragmented and partial files

Signature search finds files by their start and end markers. Large files that were stored in many separate pieces may come back incomplete. The app labels such results as partially recovered rather than hiding the problem.

Formatted and re-partitioned drives

A quick format usually leaves most data in place, so signature search can still find many files. A full format, a reset of Windows or writing a new disk image overwrites the data and makes recovery unlikely.

Repair has limits too

File repair can rebuild broken headers, indexes and archive directories, but it cannot invent missing content. A photo with half its data missing will still be missing that half.