An A02 file is simply the third part of a split archive and won’t open individually because the structural header lives in the first chunk, so programs return errors such as "cannot open volume"; proper extraction requires placing all volumes in one folder and opening the starter—either the main .ARJ or the .A00—allowing archive tools to pull automatically from A01, A02, etc.; if issues occur, they usually reference missing files, incomplete parts, or CRC errors, and sorting the directory by name helps verify that every expected volume is present.
To verify what your A02 belongs to, alphabetically reorder the directory, then look for identical prefixes—e.g., `backup.a00`, `backup.a01`, `backup.a02`—and check if a `.arj` file appears, which serves as the correct entry point; if there’s no `.arj` and the set starts at `.a00`, that’s the file to open via 7-Zip or WinRAR, and gaps in numbering or mismatched filenames signal missing or damaged segments that need re-copying or re-downloading before extraction succeeds.
Calling A02 "part 3" means it’s one numbered piece of a divided archive, part of `.A00`, `.A01`, `.A02` file groups created for easier transfer or storage, and it’s not an independent format but a continuation of compressed data whose header lives in the first volume or `.ARJ`; when names like `something. If you enjoyed this article and you would like to get additional info relating to A02 file converter kindly browse through our internet site. a00`, `something.a01`, `something.a02` match, place them together and open the initial file so your extraction software can stitch A01 and A02 back into the original content.

An A02 file usually won’t open on its own because it’s simply a mid-stream chunk of a multi-part archive, and formats store key information—headers, file lists, compression details, and checksums—in the first volume (like `.A00` or a main `.ARJ`), so opening A02 directly fails since it starts mid-stream without a recognizable signature, causing errors such as "corrupt", even when the set is intact; the correct method is to put all parts together and open the starter so the extractor can read A01, A02, and onward automatically.
When an archive tool "uses" an A02 file, it’s simply reading A02 as a continuation block rather than a separate volume, because extraction begins with the starter—usually the main `.ARJ` or `.A00`—where the header and index are stored, and once the extractor reaches the end of that segment, it automatically moves to `.A01`, then `.A02`, reading them as one continuous stream; if A02 is missing, renamed, or damaged, the process stops with errors like "next volume not found".