My 500 gb hard drive light up green makes a noise then notning happens and when \I hit desk icon i get a messege that network not ready or on up up untill this si a have no problems but I have just bought a neww 1tb buffaloo hd i am not happy pls help

what os do you have

Same problem here except with the 1TB MyBook.

maxtor one touch 3 -500 does not detect on my macbook pro worked fine on my G5

There very touchy did you move while running? if so may have broke styluses?

i use my external hard disk many times but now when i connect my lacie external H.D to PC it dose not recognized

Greetings.

This sometimes happens with flash drive. Just to be sure, do back up and reformat the flash drive. Pls update if that solve the problem. if not we will try another solution.

This happened to me as well - i have been reading that it could be the power supply adaptor. If you can try another one - it might solve the problem. The adaptors seem to either be faulty or made to stop working. Great news for us the consumer!!

The tones in repetition sound could be a defective harddrive. I've had that happen once on an internal harddrive...

Its going to be a hardware thing. Is the drive connected to a UB2 port? The network itself has its own data transfer rate  ( ie. gigabit ) you need to make sure you cables are no longer than 6 ft, its plugged into a high speed port, and that all ports on the chain are of the same speed. If you have the option, go firewire for this. If that does not rectify it, check adminsitrator properties of the drive.

Try setting configuring the privledges setting. Make sure there the network setting is correct, and make sure all user accounts have admin access to network