External Seagate drive keeps seeking

OK, So i have an 1.5 External seagate drive that up until now has been running great, the main thing i keep on it is media which i access through a USB 2 connection. as of 2 days ago the drive has been acting funny in the middle of a playback it starts seeking or searching which is the best way that i can describe this. basically the media locks for a second the drive clicks like its searching and then the media restarts a few seconds later. The audio generally keeps going but the video hags during this time. I ran SEAtools looking for drive errors, defraged it, and ran a virus check on the drive to see if maybe i picked up a bug, nothing, i have also updated all my video and audio drivers, and by the time you read this probably the drives drivers also.

Any Ideas?
 
Kind of sounds like it might be indexing or something, is the indexing service disabled for the drive?
 
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