(55).rar | !xdab_

: It may contain custom ROMs, kernels, recovery images, or specialized tools for "rooting" or modifying Android devices.

To access the contents of a .rar file, you will need a decompression utility: !XDAB_ (55).rar

7-Zip : A free, open-source alternative that handles RAR files. : It may contain custom ROMs, kernels, recovery

If you can tell me or what device you are trying to modify, I can give you more specific instructions on how to use it safely. How to open and extract rar files on Windows 10 pc? : It may contain custom ROMs