Max File Size, Number of Files, Line Length (V3, V4)
BC version 3 or 4
Folder Compare capacity is limited by the number of files being compared. On 32-bit Windows the limit is about 2.5 million files on each side of the comparison. On 64-bit Windows the limit is about 5 million files on each side of the comparison.
BC 3.1 and newer support Zip64 for files over 4 GB in size. Versions prior to 3.1 are limited to 65,535 files, with no file larger than 2 GB, and a maximum Zip file size of 2 GB.
Tar archives over 4 GB in size are supported. The maximum size for individual files within a .tar archive is 2 GB.
Filename filters are limited to a maximum of 65535 characters in the Folder Compare.
The characters per line limit is 65536 and is not configurable
The max file size supported is 500 MB for each file.
The default characters per line limit is 4096, configurable limit is 65536 characters
The max file size supported is 700 MB for each file.
All file size limits were tested on 32-bit Windows unless otherwise noted.