After copying photo files to SanDisk Ultra Luxe USB 3.1 Flash Drive, I invoke the image viewer on photos in a folder. I can view the photo but cannot forward/backward to the previous/next photo. Also the files are not stored in numerical order. I have to copy the folder back to my PC to view the photos in sequence. Any suggestions?
The SanDisk vault is for security not convenience. 
Simply copy your photo files/folders to the drive outside of the vault for convenient viewing.
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It works as you say it does. Thx, -Robert
