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BACKUP1 ZIP
File conversion

Convert BACKUP1 to ZIP

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 23, 2026
QUICK ANSWER
Is it possible to convert BACKUP1 to ZIP?
Yes - BACKUP1 converts to ZIP.

A .backup1 is a chunk of a raw ext4 image, so it cannot be zipped meaningfully on its own. Concatenate the parts into one .img, then open that image in 7-Zip (which reads ext4) and save the files out, or add them to a new .zip. 7-Zip lets you browse the image without mounting it.

Also to ZIP: KGL · IMAZINGAPP · LOCKER

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert BACKUP1 to ZIP?

A .zip is a compressed, universally openable archive, unlike the raw block image the backup really is. People convert to .zip to share just the files across any OS without dealing with ext4 mounting.

How to convert BACKUP1 to ZIP

cat + 7-Zip EASIEST

Join the parts (copy /b part+part1 userdata.img), then right-click the .img in 7-Zip, browse the ext4 filesystem and extract or re-add the files to a new .zip.

zip (Info-ZIP) OPEN-SOURCE

After rebuilding and mounting the image, run zip -r userdata.zip /mnt to archive the extracted contents into a .zip.

About these formats

.BACKUP1 Split Android Recovery Backup File (part 2)

A .backup1 file is the second part of a split backup created by an Android phone or tablet in System Recovery Mode. When the userdata backup is larger than about 2GB, the recovery splits it…

Open .BACKUP1 details →
.ZIP ZIP Archive

A ZIP file is a compressed archive that stores one or more files in a single smaller package. On Windows, macOS, iOS, and Android you can open it without installing anything - just…

Open .ZIP details →

Quality & what to watch

  • You must rebuild the full raw image first; a single .backup1 part has no complete filesystem to zip.
  • 7-Zip can read ext4 images but not every Android partition layout - encrypted or f2fs userdata will not open.
  • Zipping stores files only; Linux permissions and symlinks are not fully preserved inside a standard .zip.

Frequently asked questions

Can 7-Zip open a `.backup1` directly?
No. Join all parts into one .img first, then 7-Zip can read the ext4 filesystem inside it.
Why can't I just rename it to `.zip`?
The backup is a raw disk image, not a zip archive - renaming does not change the internal structure, so it stays unreadable.
Is the extracted data compressed?
Only once you put it in the .zip. The raw image itself is uncompressed and full-partition sized.
What if the image is encrypted?
Then neither 7-Zip nor zip can read it; encrypted Android userdata must be decrypted on the original device first.