So it's faster to use a (good) external hard drive connected by USB, than an internal hard drive which is directly connected? That's surprising. I always thought that USB was fairly slow as transfer rates go.
I don't really know what I want, which is why I'm asking for things to look for I should be able to check it out and actually try it before buying.
FAT32 over 32GB or larger filesystem got a very slow read/write speed, like if youre going to write a 32kb of data with 20000files of it, it would take 2 hours to copy all of it. Read speed is little slower too so if your game contains 10000 files or more, better store it in internal HDD as it can read the data much faster than external HDD.
External HDD are slow in PS3, because of FAT32 filesystem.
You can actually see this by loading a certain game like Hatsune Miku Project Diva F in external HDD and loading a single game takes extra 15-20seconds while when you compare it the same game stored in internal HDD, the game loads much faster like it loads about 5-7seconds.
Either way, the Mandatory Game Data Install will fix this external HDD read slowdowns anyway.