Can I use a memory sick on mu iPad to store items
Can I use a memory stick in my iPad
Question marked as
No details here of your iPad model or installed version of iOS/iPadOS.
You can access USB storage devices if you have iOS/iPadOS13 or later installed. If your iPad has a Lightning port, you will require an Apple Lightning to USB 3 Camera Adapter:
https://store.apple.com/uk/xc/product/MK0W2ZM/A
More information can be found here:
Connect external devices or servers with Files on iPhone - Apple Support