Lol I just checked and I have 30GB as well. I vaguely remembering hearing about this, and must have done it already.
I use OneDrive & have since I tested it for MS. Currently I have 40GB (15+10+15) of free space & haven't used over 500MB of that. Mostly I use it when I take surfing photos of my friends (Hi Res) @ 5MB each photo. After separating the subject(s) by name I find the best ones (IMO), crop, resize & rename them then mail the cropped one to the subject. I also offer to give them all of the full sized images, if they want them. That's where the One Drive comes in as I can upload them to the cloud, give them the link & step-by-step to DL them. I ask they let me know when done then I delete them from my OneDrive, this has worked very well for me. I also use it for emailing video Christmas cards (w/ audio) that I create from my vacation photos & send a link to my family & friends can DL or just view it. I plan ok keeping it! Edit: I also shoot videos of my friends surfing that I edit w/ Premiere Pro & upload them too, to make available to them, way easier that having them bring a flash drive to the beach.