Yes, you can safely delete wsappbak from any USB drive or external storage.
The file is not required for the proper functioning of Windows, your PC, or the bootable USB drive. Deleting it will not prevent you from using the USB drive as installation media—the core setup files remain intact.
However, there are two nuances to consider:
A handful of utilities have begun adding explicit support for this orphaned extension: wsappbak
| Tool | Support Level | Action |
|------|---------------|--------|
| WhatsApp Recovery (Android) | Partial | Can auto-rename .wsappbak to .crypt12 during scan |
| EaseUS MobiSaver | Full | Recognizes as WhatsApp backup, extracts readable text without renaming |
| Dr.Fone – Data Recovery | Full | Treats .wsappbak like .crypt12 |
| Tenorshare UltData | Limited | Requires manual rename |
If you do not want to risk manual renaming, using one of the above tools may offer a safer restore path.
You can restore using the appcmd tool:
%windir%\system32\inetsrv\appcmd.exe restore /backupFile:C:\Path\To\Backup\mybackup.wsappbak
| Misconception | Reality | |---------------|---------| | It is a Windows system file | No. It is generated by installation media tools, not by Windows itself. | | Deleting it will break Windows | No. Your installed OS is unaffected. | | It is spyware | No. It contains no network communication code. | | It is required for booting | No. The bootloader is in separate files (bootmgr, BCD, etc.). |
No, the file itself is not malicious. However, it contains your entire chat history in encrypted form. If an attacker obtains your wsappbak file and your WhatsApp key file, they can read all your messages.
If you are annoyed by this file cluttering your USB drives, you can prevent its creation by: Yes, you can safely delete wsappbak from any
Note that the file is harmless, so prevention is purely a matter of personal preference.
If you keep finding random wsappbak files on your phone and want to stop it, follow these best practices: