To install file drop please go to the Google WorkSpace listing and click install.
Click continue and select the account for which you want to install the add-on.
On the next screen click Allow accept the permissions to install the add-on.
It takes a few seconds and you will see the success message. The FileDrop add-on is installed.
To start it please go to your Sheets file, click on Extensions >> FileDrop >> Start FileDrop.
If you don’t see the Start link please refresh the browser.
The add-on will open as a sidebar in the right side and you are ready to insert file in your cells.