Hi Abby Britton,
Dear member of SanDisk Community, welcome.
1- Not change the location, nor either the name, of the folder [SanDiskSecureAccess Vault], that contains the encrypted files.
This folder , must be at the root of the UFD (USB flash drive or pendrive), to run.
2- To extract a file it out of My Vault, select the file, and in toolbar, click on File, then “save to”.
3- There are, an option, in the toolbar My Vault, _ which generates Backup _ (for SandiskSecureAccess Vault ), to your PC.
4- Please, _ read carefully , the following article,_ in link:
Luck, and then you tell us, what happened, please.
Regards, Alfred. (Google translated)