BGA Archive

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:
 * BZA, presumably based on bzip2
 * GZA, presumably based on Gzip

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.

Identification
BZA files have bytes (" "...) at offset 4.

GZA files have bytes (" ") at offset 4.

Better identification might be possible. More research needed.

Software

 * IZArc (read/write)