A) I am using Microntroller which do have usb interface. & have to connect pendrive to store data.
Dont want to change the MCU, as its lots of other code

B) Is there any uart to usb converter?
Issue is most of uart to usb converter makes MCU as device & PC remains as host

C) While in pendrive case, Microntroller has to be usb host.
Is there any uart to usb converter for this kind of application?

 

Is there any uart to usb converter?

hi VT.
Check this link.
E
https://www.amazon.co.uk/s?k=usb+to...to+uart+converter+cable,aps,85&ref=nb_sb_noss

 

You can check this paper: https://datakey.com/support/whitepapers/embedded-usb-flash-drive-how-to-white-paper

 

Search for VDrive from FTDI.