I have a 1TB external USB HD (My Book Essential Edition 2.0), and recently I've been having a nasty little issue with it. After partitioning it out it seems to sporadically showing up as write protected, preventing me of course from adding/changing anything to that partition. The other partitions seem to work fine during this occurrence. Initially I noticed this when mounting an encrypted partition using TrueCrypt (TrueCrypt mounts the encrypted partition under a separate drive letter when it decrypts it), I wrote this off as a little bug with TrueCrypt as I noticed dismounting and remounting fixed the issue. Later, however, I got the same message telling me that a separate (non-encrypted) partition on the drive was write protected. As the partition was new and had little on it I just copied the files over to another partition, deleted the partition and remade it, fixing the problem. This is a very troubling issue as doing little work arounds like that are obviously a huge pain. I doubt very seriously that TrueCrypt is playing a role in this as the second partition to act up like this was untouched by it. As far as my OS I'm using Vista 64bit. I've used the drive previously (unpartitioned) under XP 32bit without any issues like this, and it has been running flawlessly under Vista 64bit until recently after the partitioning out of the drive. Below is the partitioning setup if that info could be of any help. Partition 1 - 100GB (NTFS)* Partition 2 - 250GB (NTFS)* Partition 3 - 250GB (NTFS)* Partition 4 - 100GB (NTFS)* Partition 5 - 50GB (NTFS) Partition 6 - 50GB (NTFS)* Partition 7 - 100GB (NTFS)* (31.51GB Free Space) *These partitions are encrypted.