You can save any PDF onto an iPad, and read them in apps like Apple Books and Google Drive. Here's how to save PDFs on an iPad, with specific steps.
You can choose where downloads go on your iPad so they're easier to find. Here's how to download files on an iPad, and where to find them later.
If you use Word or Excel to edit documents and spreadsheets on your iPad, and you need to save a copy of your file to Dropbox, then this article will show you how you can save Microsoft Office files ...