A:AnswerI do not have a gaming console, but if external storage can be attached and used by PS2 and PS3 units, I don't see any reason why you could not store games on this.
A:Answer1 TB equals 1 million MB; so divide 1,000,000 by your average photo file size. For example a full frame DSLR 24 MP camera may have RAW file size of around 28 MB, which would give you space for around 35,000 images.
A:AnswerI do not use it for that purpose, but it has enough capacity to do that.
I have archived over 8,000 picture files (many in the high resolution "raw mode") with no problem.