The default SkyDrive Pro storage space in Office 365 is now 25 GB-for both new and existing customers.
Each user in SharePoint Online for Office 365 gets an individual storage allocation of 25 GB for personal site content. Personal sites include the user’s SkyDrive Pro library, a Recycle Bin, and personal newsfeed information.
All SharePoint Online in Office 365 plans include the same storage allocation for individual personal sites. This storage allocation is separate from the tenant allocation.
In addition, SharePoint Online admins can now increase SkyDrive Pro storage space for those individuals that need and want more than the default 25 GB of storage. You can select increases in increments, up to 50 GB or 100 GB (the current SkyDrive Pro limit), and you can adjust the storage for up to 25 users at once. The storage you allocate will come from your tenant's overall pool of storage and you have clear visibility of how much total available tenant storage your company has to allocate to your users' SkyDrive Pro.