A Microsoft file hosting and synchronization service.
Hey there, Office
If I was you, once you get this sorted. Download all of your files onto the computer from the business OneDrive account. Then purchase a Microsoft 365 licence here: https://www.microsoft.com/en-gb/microsoft-365/buy/compare-all-microsoft-365-products
This way, you are in full control over your account, not someone else. You also get 1TB of storage for OneDrive and access Microsoft Security amongst other products.
You would need a @outlook.com account for the personal subscription to be tied to.
The problem with purchasing cheep subscriptions that someone else manages is that they can remove/delete the subscription at anytime. They can even reset your password and get access to your account and see what files are stored on the OneDrive account.
Hope this helps,
Nathan