There's no shortage of options for saving research materials and the papers or projects that you're working on.
At AUArts, each student has a OneDrive Cloud account, via their Microsoft email account.
The link to OneDrive is on the MyApps page.

If you have access to a Gmail account, saving your material in the Google Drive account is another cloud storage solution to consider.
Other Cloud storage options include but are not limited to DropBox, Box, iCloud and sync.com
There might be situations when your assignment or project includes multiple pages, but you've been asked to submit only ONE document.
There are several applications available that allow you to combine PDF files!
There are free online tools from Adobe, PDFGadget, or other third-party services like iLovePDF that can take multiple PDF documents and combine them into one single document
Adobe has two versions of their tool - if you have a subscription to their desktop version of Acrobat, the Combine Files tool is included on the All Tools page.

You can also use Adobe's free Merge PDF Files tool on the Web! Take a look at the their step by step guide for linking multiple PDF's into one document at this link.