iOS 13 enables access to external hdd such as usb stick and ssd .i use an iPad Pro 12.9 (usb 3 camera connection kit with usb 3 hub and lightning to usb cable. ). I can copy files from a card reader to an ssd or a usb stick
i’ve settled on an m.2 250 gb on a usb 3 adapter
i can view the photos in files app but not import them in my official affinity software
which makes me regret to have bought the app
especially since I can import those files /share them into darkroom...