[TwoNotes]

MobileSheets definitely will not automatically import files that are copied into the MobileSheets folder (which is what iTunes is going to do). That's just not how the app is designed - you have to explicitly import a file into the library using one of the import options (or open the file using the Files app and MobileSheets should import the file automatically and prompt you to select the import settings). There are reasons for this - the design is carried over from the other operating systems where users can manage their own files and folders, and it's not always desirable to have MobileSheets just automatically import any file it finds. 

If you want to copy files from iTunes into the MobileSheets folder, that's perfectly fine, but then you need to tap Import->Local File in MobileSheets, go to the MobileSheets folder and select each file you want to import into the library. In general, I think importing or batch importing off the cloud is probably a better choice though, as it will ultimately be easier/faster. If you are on Windows, you can use the companion app to add files over WiFi, which is another potential solution. The companion app is going to support more platforms later this year once I have time to work transferring it to a new cross-platform framework.

Mike

Thanks for this - great info.

I've read it a few times, and while I don't know the intricacies of iPad, iTunes, or MobileSheets, I think I understand what you are saying.

I did try to use Companion, but it couldn't find the iPad.  My Windows 11 PC has Wi-Fi, but not BlueTooth.  The iPad was connected by cable to the PC, but still couldn't find it.  I might give it another try to see what the issue was.  In the meantime, I think I'll continue uploading to Google Drive and importing from there - although a lot more steps involved, that seemed to work OK.