Basic storage questions

I just went into the Document Cloud from Acrobat Professional DC for the first time, and am a little confused. I've tried to find some answers in the forums, and now I'm even more confused. I am working on a Windows 10 PC and am a Creative Cloud subscriber. My goal is to be able to share files between devices to read them and not use iPad storage space if possible.

I'm hoping I can just ask a few basic questions here and get some quick answers:

1) If I delete a file in the loud.acrobat.com/folder, does it delete on my computer and/or my iPad as well? I'm hoping not because there are files listed that I don't want on Document Cloud and need to keep. There are about 13 files listed and I know I only manually uploaded two of them today as I'm going in for the first time. I don't know how the others got there.

2) On the iPad, if I am logged in to Acrobat Reader, select Document Cloud on the dropdown, and read the file, is that now also stored on the iPad? I really don't want these files to take up storage space on my iPad.

3) There is something about DropBox. Dropbox files do take up space on the iPad using the iPad Dropbox app. If I access Dropbox through the Document Cloud, am I accessing the online dropbox.com, or will the files still be downloaded?

I know this is basic stuff; I'm just having a hard time putting it all together.

Thanks.