Can't create snapshot repository using mounted network drive


I'm trying to add a snapshot repository using a mounted network drive, but I'm getting a FileNotFoundException on the test file it creates, but I'm pretty sure it exists...

RepositoryVerificationException[[snapshot_name] path is not accessible on master node]; nested: FileNotFoundException[/mount/backup/snapshot_name/tests-t4NjJDPqTcSkTbUHzwuw5w-master (Permission denied)

Here's a log of what I'm doing:

As you can see from the log, the network share is mounted on all nodes (3) and I can access the test file from the elasticsearch user.

I'm trying to figure out why this error occurs, can anyone point me in the right direction?

It said "Permission denied".

Does the user that Elasticsearch run as have write permission to /mount/backup/snapshot_name directory?