An A02 file represents the third segment in a multi-piece archive and cannot open directly since it lacks the primary header, triggering errors like "corrupted or incomplete"; instead, place all volumes together and open the starter—either the .ARJ if it exists or the .A00 otherwise—so tools like 7-Zip or WinRAR can automatically read A01, A02, and the rest, with extraction errors typically caused by missing, incomplete, or corrupted parts; confirming sequential filenames and matching base names ensures you’re opening the correct starting volume.

To quickly confirm what an A02 is part of, sort the folder by name so matching pieces line up, look for the same base name across files—`backup.a00`, `backup.a01`, `backup.a02`—and check for a main starter such as `backup.arj`; if it exists, you open the `.arj`, but if only `.a00` upward appears, you begin with `.a00`, using 7-Zip or WinRAR to test it; any missing sequence numbers or inconsistent naming usually indicate that a volume is absent or corrupted and must be replaced.

Calling an A02 "part 3" means it’s the third sequential piece of a larger split archive made when a tool divides a big compressed file into `.A00`, `.A01`, `.A02`, etc., so A02 isn’t a standalone format but a continuation of data, and since the header and catalog reside in the first volume (or a `.ARJ` file), A02 alone looks unrecognized; if you spot matching names like `something.a00`, `something.a01`, `something.a02`, place them together and open the starter so extraction can proceed through A01 and A02 automatically.

An A02 file seldom opens alone because it’s a mid-archive volume, and formats store crucial metadata—header info, file tables, compression definitions, and CRC checks—at the beginning of the first volume, so when an extractor inspects A02 it sees no valid starting signature and issues errors like "cannot open as archive"; putting all volumes in one folder and opening the true starter lets the tool read A01, A02, and onward seamlessly to reconstruct the original files.

When 7-Zip or WinRAR "uses" A02, it’s reading it only as volume data, not opening it directly, because the archive header and file list come from `.ARJ` or `.A00`, and the extractor seamlessly steps from `.A00` to `. If you have any sort of inquiries concerning where and just how to use A02 file type, you can call us at the web page. A01` to `.A02` during decompression; if the A02 piece is missing or corrupt, common errors include "end of archive reached early".