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MacOS Catalina excel can't save working .xlsx to PR4100

Recently I found I can only copy excel file to the PR4100. If I open .xlsx saved on PR4100, the file can’t be saved. I can see multiple new folders are created on PR4100 folder.
I always get error message:

I’ve seen discussion about this on Apple Support forum, recommended solution is to not to work excel from PR4100. Only to use time machine for backup.
I’m curious if WD has better solution.

Regards,

Hi @legendbb,

Please contact the WD Technical Support team for best assistance and troubleshooting:
https://support-en.wd.com/app/ask

Support for Western Digital Hard Drives | Western Digital

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