OneDrive Limitations

• Individual files cannot exceed 2 gigabytes (GB).
• File upload size up to 15 GB.
• Up to 20,000 individual files or folders can be synced with the OneDrive client.
• The file path (site name + site location + folders + filename) must contain fewer than 400 characters for files synced with the OneDrive client (If you exceed that limit, you'll receive an error message).
• File names beginning with a tilde (~) & (~$) are not supported.
• These names aren't allowed for files or folders: .lock, CON, PRN, AUX, NUL, COM0 - COM9, LPT0 - LPT9, _vti_, desktop.ini ("forms" isn't supported when the folder is at the root level for a library.)
• The following characters are not supported in file names: \ / : * ? " < > | # %
• You can't add a network or mapped drive as your OneDrive sync location. OneDrive doesn't support syncing using symbolic links or junction points. 
• Thumbnails & PDF previews are not generated for files larger than 100 MB. 

OneDrive Storage space per user (based on License)

2 GB

Office 365 Enterprise F1

1 TB
Office 365 Business Essentials	Office 365 Nonprofit Business Essentials
Office 365 Business	Office 365 Nonprofit Business Premium
Office 365 Business Premium	Office 365 Nonprofit E1
Office 365 ProPlus	OneDrive for Business Plan 1
Office 365 Enterprise E1	SharePoint Online Plan 1
Office 365 Government G1

Beyond 1 TB, to unlimited
Office 365 Enterprise E3	Office 365 Nonprofit E3
Office 365 Enterprise E5	Office 365 Nonprofit E5
OneDrive for Business Plan 2	Microsoft 365 Enterprise E3
SharePoint Online Plan 2	Microsoft 365 Enterprise E5
Office 365 Enterprise E3	Microsoft 365 A3
Office 365 Enterprise E5	Microsoft 365 A5
Office 365 A1	Microsoft 365 US Government G3
Office 365 A3	Microsoft 365 US Government G5
Office 365 A5	Microsoft 365 E3 for nonprofit
Office 365 US Government G3	Microsoft 365 E5 for nonprofit
Office 365 US Government G5

1 TB per user for subscriptions with fewer than 5 users. For subscriptions with 5 or more users, Microsoft will initially provide 1 TB per user, which admins can increase to up to 5 TB per user. To request additional storage, admins must contact Microsoft support.