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I am using SharePoint rest api to upload file of 250 MB I am getting some size limit error. If sombody has done similiar implementation and can provide supporting link on Salesforce will be very helpful. Thanks.
Salesforce Attachment Limit. Salesforce file size limit is 25MB per file uploaded as a file attachment, and 2GB per file uploaded as a feed attachment.

i want to upload file from salesforec lighting component to sharepoint using rest api.???

We are getting FATAL_ERROR System.StringException: String length exceeds maximum: 6000000. The maximum heap size is 6MB.?

How to send Large file from salesforce to 3rd party server usind rest API. Here i am getting error the maximum heap size is 6MB?