To create a new FTP user in Plesk do the following:

1. Log into the End User side of Plesk

2. Click on Websites and Domains

3. Click on FTP Access

4. Click on Create Additional FTP Account

5. Fill out the form that is displayed:

a. FTP Account Name: what do you want the login to be? (Required field)

b. Home Directory: This will be the highest directory they will have access to. By default they have access to / for the Subscription.
Do note they will have access to everything below this point. (Required Field)

c. New FTP Password and Confirm FTP Password should be self explanatory, type in what the FTP password should be for this user. (Required Fields)

6. Then click on the OK button and the new FTP user will be created.