I mean, I’ve just tested out the API?
These are on my own places, and Roblox has only started keeping backups since 2021. They only keep backups for 30 days, and I haven’t played it in a bit. I’m definitely sure he could use this, don’t think most people are aware of it though. If he has checked already and those older versions don’t exist, that is unfortunate.
In this image, I had the game first save my data. I then went back and did a few rolls in the game, which are 100 currency each. The old data prints the amount I had before rolling, and the new data is after rolling.
If you’ve played within the last 30 days, it should be able to be restored. Roblox automatically replaced a version of my data from 10-16-2023 with a new version when I had joined the game to test this (which would mean, that backup would get deleted.)
If you would like to read the DevForum post: Announcing DataStore v2.0 - Automatic Versioning, Data Tagging, & Listing! - Announcements - Developer Forum | Roblox