Transferring files to your IIGS in a modern world sometimes involves jumping through a few hoops along the way. This is where GSummer can help you know if the file on your IIGS is the same as the original. GSummer does this by calculating the MD5 hash of a file (or set of files) and compares the hash against the original hash. If this matches then you are pretty sure that the destination file(s) were transferred correctly. The reason that I say pretty sure is that it is possible to have two files with the same MD5 hash but it is highly unlikely that you will hit this in normal everyday use. GSummer can also be used to make sure files on your hard drive have not changed due to some sort of file corruption. Just occasionally verify the MD5 hash file to make sure files that should never change don't.

GSummer is an NDA (New Desk Accessory) that can also integrate with the GSOS Finder.

Download from: https://speccie.uk/software/gsummer/

Update: 11th November 2019 - v1.0.1

Update: 4th January 2020 - v1.0.2

Update: 24th February 2021 - v1.0.3

Update: 16th April 2023 - v1.0.4

Changes:

Fixed a bug where if a file was selected, and the window closed, "Generate mD5" remained active in the Extras menu causing a crash if selected.
Fixed a random crash when saving an md5 file if the md5 file did not already exist.
Fixed an issue where if you enabled the "Applications Get Files First" you could get into a situation where the system would display an error about "no application can be found to handle this file"