...
To upload files to Synapse, you need to be a certified user. Because Synapse stores data from human subjects research, Sage Bionetworks requires that you demonstrate understanding of and compliance with privacy and security issues. You can complete your certification by taking a short certification quiz on Synapse.
...
Learn all about uploading data (via the Synapse UI or programmatically), as well as organizing data in Synapse, including how to create projects, folders, table, and more, hereat Uploading and Organizing Data Into Projects, Files, and Folders.
Quick Overview: Uploading a File (via the Synapse UI)
...
Navigate to the Files tab.
Use the Files Tools menu to select Add New Folder (or the Folder Tools menu if adding a folder within a folder)
Decide on a folder name and click Save
Navigate into your new folder by clicking on the name, then use the Folder Tools menu to select Upload or Link to a File
Use the Browse button to select the file, or drag and drop it to upload, and click Save.
Next: Organizing and Curating Your Data
...
.