I have a USB memory stick it was working normally,
Suddenly it turns to read only (I can copy from it but I cant delete or add files to it) .
I’ve found 2 hidden files:
Sometimes kaspersky can quarantine them but they are still existed ..
I’m attaching report
Best answer by Wesly.Zhang
Maybe your removable disk has broken before. If you have a multimeter, please check whether the diode voltage drop of the data channel （+D and -D）of the USB interface is between 0.4-0.5v. If it shows OL or 0, your USB device has been short-circuited or opened in the data channel, and you need to repair this USB device .