You cant, both systems will maintain a copy of the FAT table and mass storage devices work by reading/writing sectors, hence if 2 devices had access then your FAT would get screwed when one changes it under the nose of the other.
I'm no hardware expert but I'm sure it would be possible, the device would have to act like a PC, with the File table accessible by both systems and the reading and writing of sectors being handled by a processor.
It's a shame that it's not possible to just have a USB drive plugged into the 360 and then be accessible as a network share from a PC. Guess I'll just have to buy one that does both and swap the cables when I need to.
You mean 1TB Nig
I got that same 1TB drive from PC World for 90 quid IIRC, October time
Which means that it wouldn't be a mass storage device, it would require proprietry drivers which means that it wouldn't work on PS3 or 360, thus defeating the whole purpose of the mass storage class.
Mass storage devices provide low level SCSI commands for reading/writing sectors and handling the IOCTL commands for figuring out drive geometry and such like.
It's the same reason that on iPods (or any other mp3 device) that support mass storage, that the user is locked out from using the device while USB is connected.
I saw this thread and didnt think it would be possible but I didnt post incase someone smart knew it was!
One potential option though, if you are confident with this, that is.
You buy a massive HDD (I.e. that 1TB mention) and stick it in your PC
Format your current HDD and stick it in your Playstation for extra space
Setup your PC as a media centre to stream media to the PS3 thus not taking up any HDD space on the PS3
bit like effort that though haha
http://cgi.ebay.co.uk/3-5-NAS-Netwo...QrdZ1QQcmdZViewItemQQ_trksidZp1713.m153.l1262
i got one of these, it does the job