What is .__A file extension?
Split archive file created by File Splitter & Joiner (FFSJ), a utility used to break up files into smaller parts and reconstruct them; contains the first part of a multi-part encrypted archive; used for storing password-protected data in smaller segments.
FFSJ uses the extensions ".__a," ".__b," ".__c," ..., "._aa," "._ab," etc. when creating encrypted split archives. For unencrypted archives, it uses the extensions ".001," ".002," etc. All split archive files are created with the same file size. Split archives can be created and reconstructed from multiple directories.
NOTE: FFSJ actually stands for "Fastest File Splitter & Joiner" even though the program name is "File Splitter & Joiner."
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.