How to do ACL properly

[TrueNASnoob]

Hi everyone,

I am trying to figure out how to set up individual users to have access to a particular dataset.

The way I have my NAS configured is with 4 datasets. One user (me) has read/write/execute for all 4 shares, and it works great. However, I now want to add a second and third user for a dataset called "media" but when I go to the ACL to do it, I get an error:

"FAILED [EINVAL] filesystem_acl.dacl: Named (user or group) POSIX ACL entries require a mask entry to be present in the ACL. [EINVAL] filesystem_acl.dacl: Default ACL entries are required in order to apply ACL recursively. "

I have a datashare called "media" and a user called "media". I want the user "media" to have read/write/execute permissions for the dataset called "media". Here is what I've tried to do:

- Storage > "Media" > View Permissions > Edit Permissions > Set ACL
- Add Item > Who > User > User: Media
- Check read/write/execute
- Check apply permissions recursively
- Check apply permissions to child datsets
- Save Access Control List

[Error!]

Could someone please help me understand what I'm doing wrong here?

Thanks!