Upload large files sample SharePoint Add-in

The following table lists the file upload methods that are available and describes when to use each method.

Options for uploading files

File upload option Considerations When should you use this? Supported platforms
Content property on the FileCreationInformation class. Maximum file size that can be uploaded is 2 MB. Time-out occurs after 30 minutes. Use to upload files that are less than 2 MB only. SharePoint Server, SharePoint Online
SaveBinaryDirect method on the File class. No file size limits. Time-out occurs after 30 minutes. Only use this method if you’re using a user-only authentication policy. A user-only authentication policy is not available in a SharePoint Add-in, but can be used in native device add-ins, Windows PowerShell, and Windows console applications. SharePoint Server, SharePoint Online
ContentStream property on the FileCreationInformationclass. No file size limits. Time-out occurs after 30 minutes. Recommended for:
– SharePoint Server
– SharePoint Online when the file is smaller than 10 MB.
SharePoint Server, SharePoint Online
Upload a single file as a set of chunks using the StartUploadContinueUpload, and FinishUpload methods on the File class. No file size limits. Time-out occurs after 30 minutes. Each chunk of the file must upload within 30 minutes of completion of the previous chunk to avoid the time-out. Recommended for SharePoint Online when the file is larger than 10 MB. SharePoint Online

Reference:

https://docs.microsoft.com/en-us/sharepoint/dev/solution-guidance/upload-large-files-sample-app-for-sharepoint

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