Consumers can access Office web apps via SkyDrive for free although there is a 25 GB storagelimit and 50 MB file size limit for Word, PowerPoint and OneNote files and a 2 MB file size limit for Excel.
In addition the higher costs of flash memory versus magnetic storage will probably limit the use of these storage devices to acceleration applications for some time to come.
While the feature is in beta, there's also no limit to how much storage space you use up, and there's no auto-delete function after any amount of time, so feel free to upload to your heart's content.
Either way, the sub includes 20GB of SkyDrive storage, which is to say if you previously only had 7GB of space, your limit will now get bumped to 20 gigs. (In other words, people grandfathered into 25GB don't get an additional 20 gigabytes.) Of course, you can always deactivate a particular machine through Office.com if you need to free up a license.