Here are a few suggestions. Hopefully your Clip Sport Plus will return to good behavior !!
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I always use the original micro USB cable that came with my player for transferring files with a computer. Most of my random dollar store type cables are not capable or cause transferring errors.
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When I connect my Clip Sport to my computer, the player screen turns On and then begins to alternately display “Transferring” and “Charging”. After a minute (?) the display just shows “Charging”.
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After you connect your player, use Windows File Explorer to discover your device below the section “This PC”
If you see the player, right-click on the device name. Then left-click on Properties. Then left-click on the Tools tab. Then select “Check” in the Error checking section.
Maybe report back here with your progress.