Why did I get an error message when trying to save files with special characters in their filename to an external drive?
Applicable Products
File Station
Details
Some file systems (such as NTFS, FAT32, and exFAT) have reserved characters and words that cannot be used in filenames.
If you copy/move/save files to a device using a file system with reserved characters/words, then the process will fail if the files contain reserved characters/words in their filename.
To ensure multi-device compatibility of files, you should avoid using these characters in your filenames:
/ | \ : ? < > * "
Further Reading
Naming Files, Paths, and Namespaces - Win32 apps | Microsoft Learn