Thought people would like some advise on how to play game backups on their PS3. So, the two most common ways is to either go through MultiMAN:
https://consolemods.org/wiki/PS3:MultiMAN
Or WebMAN:
https://consolemods.org/wiki/PS3:WebMAN
What you do is that you decide on which device you want to store your PS3 games on. This is important because there are are limitations to each method. The "easiest" method is to store everything on your native PS3 hard drive, but this presents the problem that you're bound by whatever transfer method you're using and the size of the drive. If you want to upgrade the internal drive, here's a guide:
https://consolemods.org/wiki/PS3:Upgrading_your_Hard_Drive
If you want to use an external hard drive (Or a flash drive), you have to two options, each with their own issues. The first option is to configure the drive into a FAT32 format. This has the best compatability with the PS3, but it poses the limitation that you cannot have any files that are bigger than 4GB on the drive. Here are most of the solutions to that:
https://consolemods.org/wiki/PS3:4GB_Files
With the easier solution being to use WebMAN to load games from an NTFS formated hard drive:
https://consolemods.org/wiki/PS3:Using_an_NTFS_External_Hard_Drive
MultiMAN will not load games on a NTFS formatted drive, so all it's good for is file transfers.
However, this poses it's own limitation in that you cannot load jailbroken game rips when using an NTFS drive:
https://archive.ph/JFMwC#post-169034
When it comes to PS3 games, there are two formats that you can find/extract them as. The first is the standard ISO format. The second is the "jailbroken" format. What the latter literally boils down to is just an extraction of the disc's contents into a folder. The reason for this format's existence is to work around the FAT32 size limitations (As, the only other method is to split the ISO). Once you figure out which drive (And/or it's file format) you want to use, here is how the folders are structured on the drive:
https://github.com/aldostools/webMAN-MOD/wiki/Game-Paths-&-Covers
Outside of that, the only other thing of note is that you'll have to open PrepISO/prepNTFS every time you add/remove a game if you're using an NTFS external hard drive. And you need to unmount the game through MultiMAN/WebMAN when you're done using it.
Hopefully that gives people enough information to get them started and answer basic questions.