After creating a new user, you need to specify what access rights the user can have.
The "User or Group" indicates who you are setting access rights for.
Select All: By selecting "Select All" it will automatically check all of the options.
Show Contents: This feature allows the user to see the contents of the folder. (Tip: This might come in handy if you a create generic folder for people to just upload and you do not want the other users to see what other users have uploaded)
Upload: Allow user to upload files to the directory
Download: Allows user to download files from the directory
Move/Copy: Allows user to move or copy files from this directory to another directory the user has access to.
Delete: Allows user to delete files in the directory.
Create: Allows users to create directories within the directory.