I've tried the freezer bag trick and made it work. Sort of. Twice in maybe 30 attempts on different drives. On both occassions I got the drive running long enough to extract SOME data from it before totally dying.
Its just another last-gasp long shot technique which might just work the odd time.
In the case of this USB drive, the first thing to do is split open the USB caddy and remove the drive from inside, and connect it to a computer though the IDE or SATA interface. The problem may well be with the USB circuitry in the caddy, not the drive. Next step if you can get one, is swap the drive circuit board with one from an identical drive from the same batch / revision number series. But if the data has value, don't do this. Use a professional data recovery service