Enter login details (these will be the same as your Revit Addin details) and click login

Select the upload category of the file you are uploading

Select the upload type of the file you are uploading

Select upload type
p6 (spreadsheet - v0)
microsoftproject (spreadsheet - v0)
P6 (xml - V23.12)
P6 (xml - V22.12)
P6Professional (xml - V23.12)
P6Professional (xml - V22.12)

Choose a file from your computer. Note a file limit of 25MB. For a file over 25MB, zip it and upload the .zip folder with only the single file.

See the success message when file is uploaded

How to Upload Files to Deep Space API