When you are using Endpoint Encryption on an exFAT or NTFS removable drive, if you copy files that are already encrypted with Microsoft's Encrypted File System (EFS), the files retain their encryption and .XML or .XML.PLIST extensions are added to the file.
Windows 10 with exFAT filesystem on removable media
Windows 7/8/10 with NTFS filesystem on removable media
Symantec is committed to product quality and satisfied customers. Symantec engineering is currently evaluating this behavior for changes in an upcoming release. This article will be updated as the issue progresses, please subscribe to be notified of updates.