Saving to exfat flash drive using macro

[ap49]

I am using LO on a linux computer
I want to save the file and a backup using a macro
this command works if I stay with linux and ext4 flash drive
but the command fails if I want to store to a exFat flash drive

oDoc.storeAsURL(NewUrl, FilePropertiesout())

I can can run file on an exFat flash drive but using this command will not save to the drive.
using the save command File Save as works??

Is the macro command only useable on drives that are not exfat or how can I save to this exfat drive

[ap49]

I have found out what was happening.
I had added the time to the filename and used colons to separate the numbers
The colons seem to cause a problem when saving to exfat.
I have changed the separators to dashes and removed the colons
The file now saves correctly on the exfat and the ext4 filesystems.
Thank you for your assistance.

[robleyd]

exFAT file system specification - Win32 apps

[ap49]

Thank you reading my post and for the exfat details.