Is there a file size limitation?

Yes, there are some file size limitations in SharePoint.

Details

Maximum upload size for a document in a library

• SharePoint on premises prior to SharePoint 2016: 2 gigabytes
• SharePoint 2016: 10 gigabytes
• Office 365: 15 gigabytes

Note: For SharePoint on premises, the maximum upload size can be lowered or increased in your web application's settings. In Office 365, that limit cannot be changed.

Maximum upload size for a list item attachment

• SharePoint on premises: 50 megabytes
• Office 365: 250 megabytes

Note: For SharePoint on premises, the maximum upload size for list item attachments can be modified. In Office 365, that limit cannot be changed.