what are my alternatives?

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1

im looking to get a wireless hard drive such as this

http://store.apple.com/us/product/MB764?mco=MTY1ODgxNQ

i have an external at the moment but i dont like being tied down with wires on my laptop so id like to find a wireless hard drive i can get
also want to use it for time machine on my mac
like to find over 500gb
and a bit cheaper then the one on the apple site

do i have any other options?

2

1…upgrade the hard drive itself
2. Network-attached storage (NAS) is file-level computer data storage connected to a computer network providing data access to heterogeneous network clients.

3

Nas.