Hi @demlasjr
I think that’s normal and has nothing to do with Nextcloud. Backblaze keeps old versions of files per default. If you delete a file in Nextcloud it gets “hidden” in you bucket, respective the direct file / download link gets removed in the WebUI of Backblaze and you could still access all versions by clicking on the number in the brackets.
You can change how many versions and how long Backbabaze should keep your files in the Lifecycle Settings of your bucket.