Good luck! and if you post, you might include OS, and hardware info. If you remove "seagate" from the words in google, you will see that other brands have issues too = 10.5.7 to blame? Is that the only time? If it's ONLY a sleep issue, then include that in your search for help! You didn't mention if/that it was specifically related to sleep. If it's a windoze-based HD, try to wipe it on a windows machine before you return it.
Step 2: Launch the Seagate External Hard Drive Data Recovery software on your system.
Ensure that the hard drive is detected by the PC. Step 1: Connect the Seagate drive to your Mac PC with the digital cable. All companies have bad batches of products. Next, follow the steps below to recover data from Seagate external hard drive on Mac. I don't think it's worth messing with too much - it's your data, after all. contact and send the other one back to seagate. get another drive asap and copy everything to it. while the prob was caused by seagate, i suspect that 10.5.7 makes it more problematic (as mentioned in this thread). Don't reformat! I meant try it on a mac w/ an older MAC OS! like 10.3.9, 10.4.x or 10.5.6.ฤก0.5.7 and my last Seagate "windoze-oriented" purchase didn't play well together.