I read about shared file on Catalina here
https://support.apple.com/en-us/HT210598
How to know what file types work with an app ? (I haven't Catalin and i can't do what is described belowCopy from your Mac to your device
Select the files that you want to copy. Select only files that work with the app.
I have a lot of files (png, aif, txt) used by my appDepending on the file type, some apps can't open files in other apps or locations. You can see the list of files in the Files tab of the Finder when your device is connected to your computer
Does Catalina accept these file types ?
If not what i have to copy files from mac to iPad ?
Thanks in advance
Jean-Marc