It’s easy to retrieve storage data for SharePoint Online sites with PowerShell, but it’s faster with the Graph. Some disadvantages do exist, but it’s nice to have a choice. TheGraph is faster, especially with large tenants, but the SharePoint Online PowerShell cmdlets can deliver more data.
SharePoint Online comes with a reasonable amount of free storage, but it’s surprising how quickly that storage can be consumed, especially if you use Office 365 retention policies. With that thought in mind, it’s a good idea to check what sites are consuming your SharePoint storage. This post covers how to write a PowerShell script to report SharePoint Online site storage, complete with a couple of bells and whistles.