What to do right now
- On a hard drive, USB stick or memory card, recently deleted files that have not been overwritten are often recoverable.
- On an internal SSD with TRIM, deleted files are often erased within minutes, so chances are low.
- A quick format usually leaves data behind; a full format in current Windows writes over it.
- Encrypted drives need the key, and drives with mechanical symptoms need a lab rather than software.
How to estimate your own chances
Identify the drive type
In Windows, the Defragment and Optimize Drives window usually lists each drive's media type as hard disk drive or solid state drive. External USB sticks and SD cards behave more like hard drives here, because most do not act on TRIM over USB.
Count what happened since
Think about what was written to the drive after the deletion: downloads, installs, updates, new photos, or simply days of normal use on a system drive. Fewer writes mean better odds, so stop using the drive now.
Work out how the files were lost
A normal delete, emptying the Recycle Bin, a quick format and a lost partition all leave most data in place. A full format, a factory reset of a phone, or a secure erase tool overwrite it.
Check for encryption
If the drive used BitLocker, you will need the password or the 48-digit recovery key. Without the key, the data cannot be read by anyone.
Look for physical symptoms
Clicking, grinding, repeated disconnects, or a drive that is not detected at all point to hardware trouble. Open Disk health & tools to read the SMART values, and if the drive is failing, stop and consider a lab.
Run a read-only scan
In Deleted file recovery, scan the drive and look at the results. The confidence level and the validated or partial label on each file tell you far more than any general percentage.
The factors in plain words
Drive type matters most. A hard drive keeps deleted data until it is overwritten, and it is rarely overwritten all at once. An internal SSD with TRIM is told which blocks are free and may erase them in the background, so a file deleted an hour ago can already read as zeros. USB sticks and memory cards sit in between and usually behave like hard drives, though some newer USB SSDs do pass TRIM through.
Time is really a stand-in for writes. A spare data drive that has been unplugged for a month may hold everything, while the system drive of a laptop in daily use rewrites space constantly. The fuller the drive, the faster free space is reused.
The way the data was lost sets the starting point. Deletion and quick formats remove the index, not the contents. Lost or deleted partitions usually leave the file system intact further in. A full format on Windows Vista and later writes zeros to the whole volume, and phones reset to factory settings typically encrypt and discard their keys, which makes software recovery impractical.
A simple way to read your situation
If the drive is a hard drive, USB stick or SD card, the files were deleted or quick-formatted recently, and little has been written since, the odds are usually good, and file names often survive. If the same drive has been in heavy use for weeks, expect some files to be whole, some partial and some missing.
If the drive is an internal SSD and TRIM is enabled, expect little unless the deletion was moments ago or the drive was removed immediately; the Recycle Bin, previous versions and cloud copies are the better places to look first. If the drive was fully formatted or securely wiped, software will usually find nothing useful. If the drive shows physical symptoms, the question is no longer which tool to use but whether to stop and call a lab.
Common mistakes that lower the odds
The most common is installing a recovery program, or saving recovered files, onto the same drive. Another is running repair tools such as CHKDSK on a drive that still holds lost files, since they can rewrite the very structures recovery depends on. Repeated scans of a failing drive also wear it further. Imaging the drive first, then scanning the image, avoids that.
When the odds are close to zero
- Data that has been overwritten by new files.
- Files deleted some time ago from an internal SSD with TRIM enabled.
- Drives that were fully formatted, securely erased or reset with encryption.
- Encrypted drives without the password or recovery key.
- Drives with mechanical damage, which need a lab rather than more scanning.
How FileFix Ultimate helps you judge and recover
- Disk health & tools shows SMART and NVMe values in plain language before you scan.
- Read-only scans with an honest status and confidence level for each file.
- Drive imaging that skips bad sectors, so a weak disk is read only once.
- Unlocks BitLocker drives when you have the password or recovery key.
- Free for personal use with no recovery limit, so you can check results without paying first.
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
What is the success rate of data recovery?
There is no single honest figure, because the result depends on the drive and what happened to it. A recently deleted file on a hard drive is often fully recoverable, while the same file on a TRIM-enabled SSD often is not. A read-only scan of your own drive is the only reliable estimate.
Is it too late if the files were deleted months ago?
Not necessarily on a hard drive or memory card that has seen little use since. On a busy system drive, or on an SSD, the chances drop sharply over months, but a scan costs nothing and does not harm the drive.
Does unplugging the drive help?
Yes, for SSDs in particular. Removing power stops background clean-up, and keeping any drive disconnected prevents new writes. Reconnect it only when you are ready to scan from another system or with a portable tool.
Do recovered files open properly?
Many do, but some come back partial when part of the data was overwritten or fragmented. FileFix Ultimate tests each file and marks it as validated, partial or unverified, so you know before you rely on it.