Tablet won't recognize OTG flash drive I have an Samsung Galaxy Tab S2 8.0 It's up to date with everything. 

Up until just now, I've never had a problem connecting external storage devices to my tablet using an OTG cable. Earlier today, it worked fine. 

Later, I tried to connect a device but it wouldn't mount. I tried a second cable. I then tried a different USB storage device. No luck. I tried rebooting the tablet. No luck. (One of the devices asks if I want to connect and that came on for a second then disappeared. Since then no luck with anything.)

This happened once before and by blowing air into the micro usb port I must have dislodged some dust and it worked. I tried that again but no luck. 

The SD card in the SD card slot is working fine. 

To recap, I have tried:

Three different OTG cables

Two different USB storage devices

Resart, Turn on and Off, Soft Reset of the tablet. 

OTG troubleshooter isn't finding any OTG even when physically connected.

Any ideas on how to fix this?
USB settings are likely clobbered. Samsung tech support cleared up the issue for me with these steps: 


Go to Settings &rarr; Apps &rarr; click on 3 dot menu &rarr; Show system apps &rarr; USB settings &rarr; Storage
Clear data (will not remove files or personal data)&rarr;Settings&rarr;General Management&rarr; Reset (will not remove files or personal data)&rarr;Reset settings. 
Approve all in the second step and tablet will automatically restart. 


I tested with an OTG device and mine worked.