Do you have of the file saved in the same folder? ark(1) - Arch manual pages

: If you get a "CRC failed" error, one of the parts is likely corrupted and needs to be redownloaded.

Archives can be viewed, extracted, created and modified with Ark. The program can handle various formats such as tar, gzip, bzip2, Arch Linux manual pages

The file is the first volume of a multi-part compressed archive. These "part" files are created when a large file is split into smaller segments for easier sharing or storage.