A couple External Hard Drive questions

[Primex]

I saw a deal for an external Hard Drive that would be really practical, but I'm clueless as to what I should get. The specs for the drive is:
- Hi-Speed USB 2.0
- Horizontal or vertical placement
- Fanless design
- 7200 RPM
- 8 or 2 MB cache1
- Stackable
- On-Off switch
- Mac & PC ready
- 160 GB
Price- $29.99 (One day sale at Comp USA on Thursday)

Is this a good deal? Also, does my computer have to be 7200 RPM? Mine is only 5200 RPM and I don't know if it would still be compatible. I'm basically trying to clear out some space from my laptop and desktop from all the videos and files I've uploaded.

 

[Sacrinyellow5]

I think it would be a good deal if your usimg it for storage!
I might have to go down to CompUSA tomorrow and see what kind of deals they are having.

 

[Trizoy]

The 7200 rpm means how fast the HD will spin... TRhe faster the better. The Cache size higher would be a lot better (8mb). For 30$ it seems like a great deal. As long as it is from a reputable store.. CompUSA does have a return policy, so it sounds like a great deal.

 

[Primex]

Sweet, yeah I'm just using it for storage. I have hours and hours of old home movies that I wanna put on my desktop but I don't wanna take all my space up. I was worried that since my computer and the external harddrive were different rev speeds that they wouldn't be in sync with each other.

What does the cache do?