Failed shard error on elasticsearch snapshot (No space left)

Hi all,

When I navigate to stack management --> snapshots and repositories I can see the snapshots list.

On that list, there is a one-column that said Failed shards.

Right now most of the snapshots show 1 failed shard in there. And when I check the summary (Kibana GUI) of that snapshot it shows the below error.

INTERNAL_SERVER_ERROR: ElasticsearchException[failed to create blob container]; nested: FileSystemException[: No space left on device]

We have separate storage to store these archived indexes and it has more than 150 + GB of available space right now.

Does anyone have an idea about why are we getting this error?