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Dragging a DNG file from my NAS into Photoshop always results in one of these two errors:
However, dragging a copy of the DNG from the Desktop instead works fine, by opening Camera Raw and the image in it.
This is odd because LightRoom (latest) opens all my Raw files from the same NAS without issues.
Note: Lightroom instead has all the privacy checkboxes and in fact it works fine with my Raw files on the same NAS:
This makes me think that Photoshop failed to ask for all the same permissions that both Lightroom and Bridge ask for, which makes them work as intended.
Things I've already tried
Thank you for your help.
Your NAS is in the wrong format for newer Mac OS. Mac OS will throw errors all day due to not being compatibly formatted ExFat with new OS specifications. Macs use HFS+ or APFS format but ExFat can be read by both Win and Mac.
I've been using LightRoom without issues off of the same NAS for months. The issue is with Photoshop only.
Anyone else who could help with this please?
As stated before, Lightroom works perfectly, it's just Photoshop which won't open the DNGs.
If its just specifically the DNGS, check your version of the Camera Raw Plugin - what version are you currently on?
However the fact that you can drag the DNG to your desktop and open tells you that it is an issue with your NAS drive. LR may work but this is a known issue with Apple Catalina and Big Sur and Photoshop. The solution is to format your externals to a Mac Compatible format for the Mac OS to read properly.
It may well be that Lightroom is not working with the original DNG but with a cached version from the library. It looks to me like a timing problem on the network. I suspect the DNG file to be quite huge.
Just tried it with a 620 MB dng from my NAS (it's a superresolution file created by camera raw) and photoshop opens it without any issues. Don't think filesize matters. I think the OP somewhere else noted it is actually the smaller files that are problematic.
Actually I recently discovered that Photoshop will open the much larger multi-shots DNGs (created in camera by my Leica SL2, 350 MB each), but it won't open the base, single-shots DNGs (47 MP each).
Can you share one of the files that doesn't work? I use the exact same setup (a synology NAS formatted the exact same way - I posted on the reddit forum too which is how I found this thread) and have no problems whatsoever with opening files (dng, NEF, tiff, psd, etc.) directly in Photoshop/camera raw from it on a fileshare mounted through SMB. There is absolutely no reason why this wouldn't work. The underlying filesystem on a NAS does not matter whatsoever. It's irrelevant since the filesystem is not exposed to the client operating system. It's just a filesharing mount. My experience shows this is clearly the case.
For some reason now Photoshop opens them without issues. I couldn't get it to work for over 2 weeks. Now it works with all of them. I didn't change a thing, no idea why it's working! Thanks for the help anyway!
Leaving a reply as after 2 weeks of testing various things out, Photoshop has suddenly decided to work as intended for no apparent reason. Sorry for not being able to explain how I got it to work. I have no idea. And a big thank you to those who helped!