What A Quick Format Writes

A drive is a long row of sectors. The file system keeps a small set of structures near the start: a boot record, a table of which sectors belong to which file and the folder tree. A quick format writes new, empty versions of those structures. It takes seconds because that is all it does. The sectors that hold your documents, photos and videos are not touched. They are simply no longer listed anywhere.

Think of a library where someone throws away the catalogue and leaves every book on the shelf. The books are there. Finding them without the catalogue is the hard part, and that is what a scan does.

Quick Format Versus Full Format

Windows offers both. On Windows 10 and 11 a full format writes zeros across the whole drive, and that does erase data. It also takes hours, which is why almost everyone leaves the Quick Format box ticked. If you formatted in a hurry, you almost certainly did a quick format. If the format took a long time and you remember unticking the box, be honest with yourself about what is left.

A format to a different file system, say from FAT32 to NTFS, is still a quick format underneath. The new structures take a little more room, and most of the drive is untouched.

How To Recover Data After Format

The steps to recover data after format are the same for a 16 GB pen drive and a 4 TB disk. Only the waiting differs.

1. Stop writing to the drive. Do not copy new files onto it to test it. Every file you add can land on an old one.
2. Open DRE Pro and pick the drive under Drives And Locations.
3. Choose Deep Scan. Quick Scan reads the index, and the index is the one thing the format replaced. Deep Scan reads every sector from first to last and finds files by their contents.
4. Let it run. On a large disk this takes time. You can pause it under Saved Scans, shut down and resume tomorrow.
5. Filter the results by type or date, preview the ones you need and save them to a different drive.

What Comes Back And What Does Not

Files found by contents usually come back whole, but some lose their names, because names lived in the index that was replaced. A photo called DSC_0417.JPG may return as a photo with a number. The preview shows what it is. Folder structure is often partly rebuilt on NTFS drives, where copies of the old records survive deeper in the disk, and less often on FAT and exFAT.

Anything you wrote after the format has taken space, and whatever was in that space is gone. Files that were scattered across the drive before the format may come back marked Risky, because the pieces are harder to join without the index. The marks in the results, Good, Risky or Overwritten, tell you before you save.

A Word On Unformat Software

Older tools called this unformatting, as if the format could be undone. It cannot. What unformat software really does is the Deep Scan described above, reading the drive by contents and rebuilding what it can. DRE Pro does the same, only reads the drive and refuses to save back onto it. The name matters less than the method, and the method is to scan, preview and save elsewhere.