connected USB device is not supported , but there was CHARGING problem. help

[Samsung_I4OLR3Z]

HELLO DEAR ,

I have a very big trouble in my Samsung m40 device.

When I connect my usb type-c charger cable then there was no problem.but When I just turn off my cable then it's says that "the connected USB device isn't support.

AND AFTER THAT, there was no connected car but it always shows that notification  and also vibrate my phone ..in notification settings g in android system there is  a option which name is alerts  ,  I just can minimise the notification what is always says that 

"The connected usb device isn't supported.BUT IT DOESN'T HAVE ANY CHARGING PROBLEM.

BUT IT ALWAYS SHOWS ME THAT.. 

PLEASE TELL ME WHAT WILL I DO ?

I AM REALLY REALLY IN A VERY BIG TROUBLE FOR THIS MATTER.

PLEASE HELP ME

THANK YOU.

DIPRO 

[subudu]

usb isn't supported . do fix it for me too

[Mksrivastava]

Kindly fix it.

[hnhk143]

i have the same problem. I  can only charge via laptop. When i connect the usb to my desktop there is no more usb option to either transfer file or charge. Desktop does not recognise usb device. Samsung device is akso not present in my desktop file explorer. I have installed  smart switch, but it's not detecting the samsung device either. Seems like i m not the only one having the issue! Please fix it asap.

[Smokeythephone]

same problem. anyone got a fix?

[rahul8778]

i am also having same problem . how to fix it?
it is showing that this connected usb device is not supported. but it is taking charging via laptop

[sruthi952092]

same to me

[AMOL0404]

I'm facing the same issue , when I plug my phone in to charge it keeps blipping the " the connected usb device is not supported " notification and keeps vibrating my phone , when I connect it to pc it charges fine without problem. Help me.

[AMOL0404]

plese help

[pfpf]

i have the same problem with my samsung m51 please fix it 

[sruthi952092]

I have prblm from M31 charging