I had a good result using BitLocker (Win 7 SP1 64-bit) with another brand of external USB hard disk (3TB) but nothing but problems with WD My Book (4TB).
Sometimes BitLocker says that encryption setup has been paused and the ‘resume’ key doesn’t do anything.
Another time it says “a device attached to the system is not functioning” – that I got around by reducing the partition size by 5GB; but then got stuck again later if the encryption process was paused (as is likely since computer sleeps, or my kids log on during the days it takes to encrypt a 4TB drive!)
I’ve taken the drastic step of wiping the disk and starting from scratch; but still having problems.
Anyone experienced similar, and found a solution?
Is it BIOS related (I use a Gigabyte Motherboard GA-Z68X-UD3H-B3 rev. 1.0 with latest BIOS)?
Is it Microsoft problem (but other drives have been fine)?
Is it a WD drive issue (interference with built-in encyrption system)?
Thanks in advance for your help,
~Andrew~