USB device connection error in my Galaxy A21s

[GamingVillager]

I'm having an issue with file transferring via USB in my Galaxy A21s. I am using a card reader for copying some files from my camera's SD card, I connected the SD card reader with an OTG adapter but my phone doesn't connect with it and it constantly refuses to switch the device control to this device. 

I have some really memorable and close pictures in that SD card so please kindly help me out.

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your concern, kindly perform the following steps to resolve your issue.

1. Check different OTGs with your device.
2. Check another pen drive.
3. Check with genuine OTG cable.
4. Check whether the device is OTG compatible or not.
5- Check the USB connection: Perform interactive checks through the Samsung Members apps.
Path: Samsung members > Support> Interactive checks > Charger/USB).
6 -Clear data of USB settings: Setting > Apps > Three dots (Appearing at the top right corner) > Show system apps > Search USB Settings > Tap on storage > Clear data of USB Settings.
7- Reset app preferences: Settings > Apps > Three dots (Appearing at the top right corner) > Reset app preferences (It'll reset the permissions of all applications)

Update the software if available: https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-smartphone-how-to-update-software/

Reset your device: https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-mobile-how-to-perform-a-factory-res...

In case the issue still persists, Kindly share the report of the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).

Warm Regards,
Samsung Customer Support