Can you use the timecapsule USB port witha portable HD for a time machine backup with new smb protocol
The time capsule system will be obsolete, Can a portable HD be plugged into the time capsule usb port and be used for timemachine
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The answer to your question is yes.
The answer to your question as it was originally titled is no. Time Capsule does not support SMB, and AFP will cease to exist in a future macOS version.