The extension refers to a compressed archive created with 7-Zip , an open-source tool known for high compression ratios using the LZMA algorithm.

: You can use apps like RAR by RARLAB from the Google Play Store to navigate to and extract the contents.

If you are trying to "produce" or extract a file with this name, you generally have these options:

: If you receive a "Can not open file as archive" error, the file header might be corrupted, which sometimes requires a hex editor to fix.