Symantec Drive Encryption does not currently support 2 TB and larger external drives. This includes GPT partitioned drives and NTFS partitioned drives that exceed 1.8 TB per partition.
This is due to known limitations with the Symantec Drive Encryption product.
Symantec Corporation is committed to product quality and satisfied customers. This Feature Request is currently being considered by Symantec Corporation to be addressed in a forthcoming version of the product.
Technical Support filed a Feature Request to add this product feature. Note that an feature request is exactly that, a request. There is no committed date for this request from the Endpoint Encryption Product Management team, nor from the Endpoint Encryption Engineering team at this time.
Please be sure to refer back to this document periodically as any changes to the status of the request will be reflected here.
Repartition the drive to NTFS and make at least two smaller partitions. These must be smaller than 1.8 TB in size independently. I would recommend making the partitions smaller than 1.5 TB in size
Symantec Drive Encryption 10.3.0 or PGP Desktop 10.2.1 or older
Microsoft Windows or Mac OSX
Hard drive 2TB or larger in size
FMR: WDE: Not able to encrypt drives with 4KB sector size, this include all 3TB drives, Samsung S1, and Western Digital Caviar Green drives
WDE: OSX and Windows: Cannot encrypt 3TB disk