UGreen NAS - Unable to enumerate contents of directory on iOS, works on macOS

App & System Services Core OS
Nik Bhatt OP
Created 7h
Replies 8
Boosts 0
Views 95
Participants 2
This post is from the WWDC26 File Systems Q&A.

I have a UGreen NAS. My app can read the contents of a folder on the NAS from macOS, but it cannot read the contents of a folder from iOS.

I bring up a UIDocumentPickerViewController(forOpeningContentTypes: [UTType.folder], asCopy: false).

I can pick a folder on the iPad’s internal storage, and successfully enumerate its contents. On the UGreen, I can pick a folder, but the content enumeration always returns zero items (no errors).

Enumeration of the UGreen works from macOS. It also works on the iPad when connecting to a Mac mini, or a Synology NAS. .

Files.app is able to view the UGreen folder and its contents. Oddly, my app cannot enumerate the contents, but it IS able to write a file to that UGreen folder.

Since Files.app can enumerate and I can write to the UGreen folder (and I can enumerate contents on other servers) - how can I get the enumeration to work? Feedback is FB22955130

Replies  8
Boosts  0
Views  95
Participants  2
Engineer OP
Apple
7h

I'm assuming you are mounting the UGreen NAS using SMB?
Nik Bhatt OP
7h

Yes, it's mounted using SMB. The NAS supports either SMB2.x or SMB 3.

Engineer OP
Apple
6h

That's unexpected. The fact that Files.app can enumerate seems like that SMB is working fine against that NAS. The fact that UIDocumentPickerViewController() is working for you on macOS, but only fails on iOS and only against that particular server is very odd. I think we are going to need a bug report from you containing packet captures and iOS sysdiagnose when the problem occurs. Would be useful to have same packet captures and iOS sysdiagnose for a working situation so we can easily compare to see what's different.
Nik Bhatt OP
6h

How would I collect packet captures? I don't have experience with that. There is a feedback already in the system. FB22955130
Nik Bhatt OP
6h

I should mention that my customers are reporting the same thing with their UGreen, so it's not specific to my unit.

Engineer OP
Apple
6h

Found the bug report. If you can add a sysdiagnose for the "working" case (like on iOS, using your app against a server that is working), that should be good enough to start with. If we can't determine what is going wrong from the failing sysdiagnose vs working sysdiagnose, then we can give you instructions on how to get a packet trace later.
Nik Bhatt OP
6h

I just made one. But Feedback Assistant is down, so I will have to add it when it comes back up.
Nik Bhatt OP
5h

OK - I was able to upload three different sysdiagnoses:

  1. iPad -> Mac mini (works)
  2. Mac -> UGreen (works)
  3. iPad -> UGreen (doesn't work) - just to give an updated one
UGreen NAS - Unable to enumerate contents of directory on iOS, works on macOS
First post date Last post date
 
 
Q