MASGAU is described as 'Automatic Save Game Archive Utility - A backup utility that automatically detects and archives saved games and can then restore them' and is a Online Backup tool in the backup & sync category. There are 2 alternatives to MASGAU for Linux and Windows. The best MASGAU alternative is Game Backup Monitor, which is both free and Open Source.
Game Backup Monitor is a simple, but flexible application that detects games as you play them. Once you finish playing a game, a backup of the saved games will be made automatically using 7-Zip compression.
A manager that can backup/restore game saves, game configs and entire games. It relies on a community-maintained database containing information on the save and config paths of various Linux Steam games.
Canada