Fail to Create Repository for Snapshots

ELK Stack on single node
ES 1.2.4
Curator 3.5.1

Want to create repository on attached NAS to save snapshots.
Running everything as root to test.
Created es_repo under /mnt/NAS/
drwxrwxrwx 1 root elasticsearch 0 Oct 31 16:02 es_repo

es_repo_mgr --host create fs --location "/mnt/NAS" --repository "es_repo"
2016-10-31 16:48:51,508 INFO Checking if repository es_repo already exists...
2016-10-31 16:48:51,511 ERROR Repository es_repo not found.
2016-10-31 16:48:51,511 INFO Repository es_repo not in Elasticsearch. Continuing...
2016-10-31 16:48:51,659 INFO Repository es_repo creation initiated...
2016-10-31 16:48:51,662 INFO Repository es_repo creation validated.

curl -XGET 'http://:9200/_snapshot'
{"es_repo":{"type":"fs","settings":{"compress":"true","location":"/mnt/NAS"}}}

[root@logstash ~]# es_repo_mgr --host 192.203.196.14 create fs --location "/mnt/NAS" --repository "es_repo"
2016-10-31 16:48:51,508 INFO Checking if repository es_repo already exists...
2016-10-31 16:48:51,511 ERROR Repository es_repo not found.
2016-10-31 16:48:51,511 INFO Repository es_repo not in Elasticsearch. Continuing...
2016-10-31 16:48:51,659 INFO Repository es_repo creation initiated...
2016-10-31 16:48:51,662 INFO Repository es_repo creation validated.

Repository created but unable to snapshot

curator --host snapshot --repository es_repo indices --older-than 44 --time-unit days --timestring %Y.%m.%d
2016-10-31 16:50:59,667 INFO Job starting: snapshot indices
2016-10-31 16:50:59,667 INFO Overriding default connection timeout for snapshot action. New timeout: 21600
2016-10-31 16:50:59,718 INFO Action snapshot will be performed on the following indices: [u'logstash-2016.09.17']
2016-10-31 16:50:59,764 INFO Snapshot name: curator-20161031215059
2016-10-31 16:50:59,850 ERROR Client raised a TransportError.
2016-10-31 16:50:59,851 WARNING Job did not complete successfully.

org.elasticsearch.snapshots.SnapshotCreationException: [es_repo:curator-20161031215059] failed to create snapshot
at org.elasticsearch.repositories.blobstore.BlobStoreRepository.initializeSnapshot(BlobStoreRepository.java:252)
at org.elasticsearch.snapshots.SnapshotsService.beginSnapshot(SnapshotsService.java:276)
at org.elasticsearch.snapshots.SnapshotsService.access$600(SnapshotsService.java:88)
at org.elasticsearch.snapshots.SnapshotsService$1$1.run(SnapshotsService.java:202)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: /mnt/NAS/snapshot-curator-20161031215059 (Permission denied)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.(RandomAccessFile.java:241)
at org.elasticsearch.common.blobstore.fs.FsImmutableBlobContainer$1.run(FsImmutableBlobContainer.java:50)