Office 365 limits

For most subscription plans, the default storage space for each user's OneDrive is 1 TB. Depending on your plan and the number of licensed users, you can increase this storage up to 5 TB.

https://docs.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits

Feature	Microsoft 365 Business Basic	Microsoft 365 Business Standard	Office 365 Enterprise E1	Office 365 Enterprise E3	Office 365 Enterprise E5	Office 365 Enterprise F3
User mailboxes	50 GB	50 GB	50 GB	100 GB	100 GB	2 GB
Archive mailboxes7,8	50 GB	50 GB	50 GB	Unlimited	Unlimited	Not available