Once you put your files on your iPad running iPadOS 13, you will find it really hard to move them off again. Unlike Android that acts like an external hard drive when connected to a computer, iPadOS doesn’t show the files from On My iPad in Files app when you connect with a sync cable to your macOS. And transferring those files with iCloud and Dropbox is really slow, days slow. And in my case, I have an older version of macOS with AirDrop that won’t talk to the newer iPad. So my last resort after being very frustated with all my wireless options was to remember that macOS provides File Sharing and I was able to add a Server on the Files app using an SMB path to my computer. Voila! All the files are transferring over to the computer very quickly. My persistence paid off.