External drive for iPad? What works?

My biggest pet peeve with using my iPad as a laptop replacement is the inability to attach workable flash drives and other external drives. I realize that this is a fault with iOS and that work-arounds are necessary. I used I-Easy Drive for awhile but it never consistently worked and I could not rely on it for bringing documents with me to meetings and court appearances. Does anyone have any recommendations for a system that would work?

I’ve used one of these with my iPhone. It “attaches” via Wifi or USB. https://www.amazon.com/SanDisk-Connect-Wireless-Stick-Flash/dp/B00ZCFYF2W/ref=sr_1_3?ie=UTF8&qid=1542903868&sr=8-3&keywords=wifi+memory+stick