A Microsoft file hosting and synchronization service.
Hi NikosKatris,
Unfortunately, accounts can't be merged. There are some workarounds, though, to get the data into your Business OneDrive.
You can sign into the personal OneDrive in a browser and download everything and then upload to your Business OneDrive.
Another method is to use the OneDrive sync app on the computer and sign into it with both your personal account and your business account. This will create separate folders on your computer that you can then move files between and will update your OneDrives online also.