As a global or SharePoint admin in Office 365, you can set the OneDrive storage space for a specific user by using Microsoft PowerShell.
Change the storage space for a specific user's OneDrive
Connect to SharePoint Online as a global admin or SharePoint admin in Office 365. To learn how, see Getting started with SharePoint Online Management Shell.
Run the following command:
Set-SPOSite -Identity <user's OneDrive URL> -StorageQuota <quota>
(Where <user's OneDrive URL> is the URL of the user's OneDrive and <quota> is the value in megabytes for the storage space. For example, 1048576 for 1 TB or 5242880 for 5 TB. You can specify any value that you want, however, if you specify a value greater than that allowed by a given user's license, that user's storage space will be rounded down to the maximum value allowed by their license.)
Note: If you want to change the storage space for multiple users, you can use PowerShell to Display a list of OneDrive accounts by using PowerShell. To disable OneDrive creation for specific users, see Disable OneDrive creation for some users.