Sending large audio files

Hi, excuse my ignorance :) I’ve just started recording large wav files on my iPad and need a way of sending them after storing them in iCloud or locally on my iPad. I can’t seem to use WeTransfer from either of these locations (the transfer simply stalls every time) and I can’t get them on to a pen drive via the camera adapter with any degree of consistency (often they’re corrupted)

Whats the best way of sending large audio files from iCloud? Thanks