Hard drive filling up fast on my Acer Aspire One Cloudbook 11....

I just bought this and the hard drive is already filling up fast. Will getting an SD card make a difference? What can I do about this? I won't be doing anything fancy on it - just internet access and using the basic 3 MS Office products.

Right now there's only 654 MB of space left. I have not yet installed my printer driver on it because I want to see what the resposnes are. Should I get an SD card and install the printer driver on the SD card?

More info:

eMMC 16GB
2GB DDR3 L Memory

Thanks!