New IPad pro

The tags appended to your post, selected by you when submitting you post, suggest that you have an iPad with iOS9 installed. If this is the case, then no - you will not be able to use external storage devices with your iPad.

If, however, you have an iPad with iPadOS13 or later installed - yes, you are able to use external storage devices with your iPad:

Connect external devices or servers with Files on iPad - Apple Support

Depending upon your model of iPad, you may need an Adapter.

Yes.

Make sure the device can be used with iOS before you buy.