I noticed that if you have limited priviliges like nx-blobstore-read there is a message in the UI next to discard "Update is not supported for blob stores".
I believe back when we had simple "File" only this was true, but now update allows soft quota changes, promotion to group, group adjustments, S3 configuration and even changing of path. The message seems way too generic even untrue.
Borderline improvement but I went with bug because of the untruth.
Suggestion is to change this message to match repositories "You do not have permission to update blob stores".
I would have just changed this myself but I'm not sure if there's a case where this message as written is actually appropriate.
If folks feel there isn't, feel free to denote here and I can look into submitting a PR.