Your Deleted Files Never Really Die
Deleting a file only removes your computer's note of where it is. The data stays until something overwrites it.
The script
When you delete a file, your computer doesn't erase it... it just forgets where it put it.
Your drive keeps a list. Which file lives where.
Empty the bin, and it crosses your file off... and marks its space as free.
But the file itself is still sitting there.
Every photo. Every word.
You see, it only disappears when something new is written over it. Until then, recovery tools can bring it back.
Hard drives can keep a deleted file for months.
S S Ds are different... they often wipe freed space on their own.
But on an old hard drive...
The facts, checked
- Deleting a file, even after emptying the Recycle Bin, normally removes or marks its file-system entry (e.g. the NTFS MFT record) and frees its clusters; the data remains until overwritten.
- File-recovery tools scan for those unoverwritten clusters, which is why recovery often works on hard drives.
- On SSDs, the OS sends TRIM for freed blocks and the drive's garbage collection erases them, often soon after, so recovery from SSDs frequently fails.
- Secure deletion means overwriting (HDD) or using the drive's secure-erase or encryption (SSD).
