Try M3 Bitlocker Loader if your NTFS drive is Bitlocker encrypted
Q: iBoysoft Drive Manager has updated to macOS Big Sur?
A: No. If in that case, please try iBoysoft NTFS for Mac which supports macOS Big Sur.
Q: After updating to macOS Catalina, external drive is not recognized by iBoysoft Drive Manager, how to solve it?
A: It is caused by the security feature in macOS. Please open System Preferences > Security & Privacy > Privacy > Full Disk Access > Allow iBoysoft Drive Manager.
Full Disk Access is a new security feature in macOS that requires some applications to be given full permission to access a user's files.
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