External Hard Drive?

[jono_0101]

i had a question for everybody, my 40GB PS3 has recently told me that it is running low on disc space and i am now unable to start up games because it lacks the space to run them, so i went out and bought an external HD rather than a new internal one, so my questions are:

1. will the external HD work with the PS3? because i have connected it and the PS3 recognizes it, but i cant figure out how to set the PS3 to begin saving game data into the external HD, it keeps trying to install on the internal and tells me there is not enough disc space to do that

2. If it does work with the PS3, will i also be able to connect the external HD to my PC and use it for extra storage on there as well? I bought a 500GB external HD with the thought that if it would work with both devices, i could just keep a lot of my music and video on there as well as game data and free up a lot of space on both devices

any help is greatly appreciated!