I spent an hour on chat with Roku Support regarding this issue today. Here is the transcript, slightly abbreviated:
Chat session begin: 13:33:40
Me: Hello. I purchased a new Roku Ultra Streaming Device in March of this year specifically for the purpose of attaching a hard drive containing my media to view on the TV. (I was previously using a Roku streaming stick. I love Roku!) Everything was working great and I was extremely happy with the new device and the new remote control that allows me to use headphones!
However, just a couple of nights ago I went to access the content on the attached hard drive with the Roku Media player like I always do, and suddenly a new pop-up displayed, saying something about "Allow access to external media: The external media you have connected can be read by channels installed on your Roku device. Please choose to allow or not allow access by installed channels below" - What??? I don't want "channels" accessing the content on my hard drive! Taken by surprise, I pressed "No" and then -I- was not able to access my own hard drive!!!
Now I get an error message about "Connecting to a DLNA Media server or USB device."
HOW DO I GET THAT DIALOGUE TO SHOW AGAIN so I can choose "Yes" this time, and presumably have access to the media on my own hard drive, like I had up until now?
I tried disconnecting/reconnecting the drive, uninstalling/reinstalling the Roku Media player app/("channel") without success. Help, please!
Device info:
Roku Ultra - Model: 4800X
Serial: ###
Device ID: ###
Software version: 12.5.9 - build 4172-C2
Pallavi: Please confirm whether do you have 16gb USB drive?
Me: I am using the same hard drive that I have been using since connecting it to the same Roku device back in March. Nothing has changed on my side. The issue is with the recent software update that rolled out: v12.5. Others in the Roku Community are also experiencing the same issue with no longer being able to connect to their USB devices, see:
https://community.roku.com/t5/Solving-playback-issues/Problem-reading-USB-through-Media-Player/td-p/909415
Pallavi: Okay, Im really sorry, Just to reconfirm whether Channels were not playing on Roku Ultra (4800X) ?
Me: My channels are playing fine. I access Plex, Emby, Amazon Prime.
Pallavi: Okay, May I know which device is connected to Roku?
Me: It is a 'Western Digital 2TB Elements Portable HDD, External Hard Drive, USB 3.0', formatted with the NTFS file system. Like I said, it has been working perfectly for 8 months, until the recent Roku software update. Roku needs to push out a patch/bugfix.
Pallavi: Okay, Please give me a moment while I'm checking this for you with my resources. I will get back to you in a couple of minutes (2mins).
Pallavi: Please go To Home>> Setting>> System>> USB>> Media >> Enable always on.
Please go through this article:- https://support.roku.com/article/208754908, If any doubts please ask me.
Me: OK, Under 'USB Media' the only choice is "Auto Launch" on/off. It is already on.
That is under Home> Settings > System > USB Media > Auto-launch
The other setting under USB Media is "Launch Channel (Roku Media Player)" - which is enabled.
Pallavi: Okay, Please remove the Roku device and connect to different HDMI port.
Me: Why would I need to change ports when it is a Roku software issue? My device was working flawlessly until the software update.
Pallavi: Please press home buttons for 5 times and press the back button for 5times, you would get the ISSUE id please do share us the issue id to us and attach the same to this chat here.
Me: ID X6-###
Pallavi: Can you share the issue id tracker details?
All the details in the above page?
You can take the image of the tracker details and share it in the chat.
Me: [took photo of ID Tracker dialog, emailed it from the phone to the computer where I was having the chat session, downloaded the image and attached it to the chat. Wish I was getting paid by the hour for this!]
Pallavi: Thank you for sharing the complete details, I'll have this investigated and revert via e-mail with the update at the earliest possible. Until then, your patience is highly appreciated.
Me: Ok, thanks. I, and many others, look forward to the resolution to this issue so we can access our media on our USB devices. Another software update with the bugfix!
Pallavi: Sure, Will work on high priority and do needful to you, Is there anything else I could assist you with today, please?"
Me: Is it OK to turn off the TV now?
Pallavi: Yes, Please.
Me: Thank you and goodbye.
Chat session end: 14:32:57
Note: Customer Support is now in touch with me via email, and when/if a resolution is found, I will report back here to the Roku Community!