As a 5yr Ark server admin the save system is far from perfect. The way it works is this. The current save is saved once every 15min. Then, once every 2hrs 10min it renames the save and starts a new one five min later. This means that, should your save get corrupted, you can lose two hours of work. Better than everything, but still not the best. Currently there is no way to change this setup.
Due to this I wrote a small C++ app which monitors the Ark save directory and when a file is modified (player profile, tribe profile, or the save itself) the modified file is instantly backed up. This allows me to roll back, at MOST, 15min at a time. Far better than the built-in setup.
I run my 7 Days server from a batch file which backs up at server startup. I have not monitored the save while playing. Is it saved every X minutes also? If so I can very likely make my Ark backup app run with 7 Days.