Phones spontaneously connecting and disconnecting to computers

I used to use EZ File Manager and a shared folder on my PC.
It work FANTASTICALLY but then that feature fell behind a pay wall and EZ File Manager bit the dust .
I used my shared drive for everything.
I really could use a replacement.

I had issues with a USB cable disconnecting a tether.

issues, which took weeks to figure out, and only as a guess…

  1. note book on battery life mode (constant 60% charge)

  2. A malfunctioning PowerBar. The on/off switch light kept flickering.

After replacing the PowerBar and upping the battery to 80%, no more phone USB issues.