The Paragon website says that there is elegibility for a free upgrade.
https://www.paragon-software.com/home/ntfs-mac/#oem
But their reply says to email WD, then WD says to ask Paragon. So looks like there won't be any free upgrade available lor.
You are right.
Paragon website says the following.
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I’m a user of a Seagate or Western Digital device with pre-installed NTFS for Mac. How can I get my update?
You are eligible for a special update for you current version of Microsoft NTFS for Mac by Paragon Software. Please contact our Support Service at
support@paragon-software.com to reclaim your update.
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If they do not honor the above, the only option is to wait for WD/Seagate to release the upgrade version for M1, if that happens at all.
Right now I use two drive strategy.
1) Apple APFS formated drive with Time Machine. Just ordered a 4TB WD external drive for this one.
2) Microsoft exFAT formated 4TB USB drive for document backup, common with the Windows laptop. Windows laptop will have its own NTFS formated 4TB USB drive for backup as well.
Then I have faster external USB SSDs (256GB/512GB, exFAT) for temporary file sharing.