Problem
You want to import files in .csv or .sh format, but in your workspace UI Import Notebooks modal you don’t see either of those options. Instead, you see only .dbc, .scala, .py, .sql, .r, .ipynb, .Rmd, .html, and .zip. The following image shows an example of the UI. 
Cause
You have enableWorkspaceFilesystem and enableFilesInWorkspace set to “false”.
These are protected workspace properties that prevent the Import Notebooks modal from displaying a complete list of options when set to false.
Solution
Use the Enable/disable features API to change the workspace settings.
- Navigate to http://<your-workspace-address>/config. This URL returns a JSON object with all configuration variables of the workspace. Search for 
enableWorkspaceFilesystemandenableFilesInWorkspace. - Run the following commands as a workspace admin user in a notebook to set both configurations to 
“true”. 
$ curl --location 'https://<your-workspace-URL>/api/2.0/workspace-conf?keys=enableWorkspaceFilesystem' --header 'Authorization: Bearer <TOKEN>'
{"enableWorkspaceFilesystem":"true"}
$ curl --location 'https://<your-workspace-URL>/api/2.0/workspace-conf?keys=enableFilesInWorkspace' --header 'Authorization: Bearer <TOKEN>'
{"enableFilesInWorkspace":"true"}