You are trying to encrypt an NTFS formatted drive with Symantec Encryption Desktop that has a volume label of 32 characters.
Error code -12214: This disk/partition cannot be encrypted because the format of one or more of the partitions is not supported.
Symantec Encryption Desktop has an NTFS volume label character limit of 31 characters. This is by design so all volumes must contain 31 characters or less to be encrypted by the software. Using 32 characters will generate the error.
Keep NTFS volume names at 31 characters or less.
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