Two OneDrive accounts question

In a small office we are in the process of renewing the main PC and have a query about OneDrive account.
I did not realise that the older pc which is running Windows7 had a OneDrive folder and has Office Home and Student installed, the ISP IMAP email account is used to sign in to OneDrive 5Gb free account.

On the new pc running Windows 10 Pro and Office365 Personal with 1Tb OneDrive storage, this pc also has a OneDrive folder which is attached to the Microsoft Outlook.com Office 365 Personal account.

We will be transferring all data from old pc to new pc so my
Questions are;

1. Can we keep the two OneDrive accounts? (With different sign in credentials)
2. Which account would automatically use the OneDrive folder on the new pc?
3. I assume that the best option would be to upload the data from the old pc OneDrive account folder to the new pc OneDrive account folder so that all OneDrive data is in the same account and OneDrive folder on the new pc. I am correct?

You can keep both accounts the one on the new PC uses is the one you sign into on that PC you can copy the data to the new account or keep it safe on the old account you can get the data from phone or other device

Having thought about it I think it would be best to upload the data again but this time to the new pc OneDrive account so that it is all in the same OneDrive folder on the new pc.