A Microsoft file hosting and synchronization service.
Hello MarionWalker-Campbell,
I am Jaspreet Singh an independent advisor.
There is just a name change from onedrive +100 to onedrive standalone 100gb nothing else has changed.
You may have synced more files than you had storage for which is why you are getting over the storage limit message.
Visit www.onedrive.com in your device browser and check if you are actually going above the space limit (left hand below corner will show you a bar with the used storage out of total storage) if you are going above the limit reduce the files that are being kept on onedrive.