BGA Archive is a family of compressed archive formats. It seems to be a kind of container format used to turn a single-file compression format into a multi-file format.
There are two known members of the BGA family:
The origin of BGA is undetermined, but it might be native to IZArc. The IZArc change log says that BGA format was added in version 3.2.
BZA files have bytes
42 5a 32 00 ("
BZ2"...) at offset 4.
GZA files have bytes
47 5a 49 50 ("
GZIP") at offset 4.
Better identification might be possible. More research needed.
- IZArc (read/write)