USB > USB C adaptor

Sorry to crossthread, pretty sure this has been covered in OP backup threads before (is there a search function on this forum? Can’t see it?).

Seem to remember people saying they can back up op-1 to android. I’d like to have that option and also like to be able to pull files from USB thumb drives, all to my phone (LG g5, usb-c). Anyone got a UK link for cheap little adaptor that they’ve found to be solid? I’ve seen some for like 99p…legit/reliable?
Thanks