Samsung Galaxy Tab S9 FE SD card reader issue

[Dreamspinner3]

My Samsung Galaxy Tab S9 FE is not allowing the card reader to upload photos from an SD card. It recognizes the Reader but only allows charging - all other options are greyed out. It worked when I first got the card reader, but recently stopped. I even changed Default USB configuration to Transferring files in Developer Options. My Galax S24 recognizes my USB SD card reader & the one I bought supports OTG, "USB C to USB OTG Adapter 】 Support SD/Micro SD cards, but also compatible with all kind of cameras, flash drives, keyboard, mice, hard disk ,etc. Great convenience for you to transfer files between different devices." Can someone help me with this? Thanks!

[officialguy]

Have you examined the security settings? It sounds like you have 'maximum protection' turned on, which allows the USB to only be used for charging.

[realaud · Accepted solution]

Did you turn off auto blocker?  If you have auto blocker on, nothing you do in other settings will allow actions through the USB port.