unable to delete photoshop files that claim to be "in use" but are not, anyone know a solution?

Oh this is completely outrageous.  Photoshop just did it to me AGAIN, after over 24 hours of struggling to save another huge file, it failed "because of a disk error" (so vague), and produced ANOTHER HUGE UNDELETABLE FILE (this time to the tune of 77.9 GB!  

Adobe, please fix your software to work regardless of where i'm saving my file.  This is beyond unaccaptable and is becoming the norm.

Oof, I mean, from a workflow perspective I'm not sure how that would ever be practical, having to constantly transfer huge files back and forth, overwriteting, confusing copies and versions (don't accidentally overwrite the good with the bad, etc) and just waiting for hour and hours for files to copy every time I need to work on something (and having to know in advance all the files I'll need because I have to pre-emptively move them all over to my laptop). 

Seems like the easier fix would just be for Adobe to make their software work with external storage, especially if they're going to generate gigantic files (the one in question is ~9gb and its not the biggest one on the drive by any stretch), and like I mentioned earlier, even without any of these files eating space on the computer harddrive, I'm already getting "scratch disk full" warnings regularly.  I know it's not the top-of-the-line computer, but seems like you'd need a beast of a machine (and infinitely faster wireless transfers than I've ever experienced) to work this way.

As far as "bricking" a portion of data, does that mean it basically broke part of my hardrive and that 9gb of space is essentially unusable now?  This is a persistent problem, these crashes while saving and the resultant undeletable files have hit me at least half a dozen times now over the past year or so (thankfully the previous ones weren't so large), but it seems like something that needs a fix, not a workaround.

@cryanhorner thats what I was afraid of - when it crashed it most likely bricked that portion of data making it unable to remove/edit/save over. Reason number 198 why Adobe recommends saving/working local then transferring to a storage location. Sorry.

Okay, I opened the file from the NAS, made a few edits (flattened the layers, changed image size to 1"x1" @ 1ppi), and it allowed me to save that file no problem to my downloads folder on the Mac.  

So I closed the file, then reopened it again (the new version) and tried to save-as to the original NAS location to overwrite the broken version, but got a "could bkrisave file because of a disk error" message.  So it's just the version that's on the NAS drive that I cannot scrub off of the drive.

I will attempt this now to test.

Is there any reason to think that opening/saving via the standard version of Photoshop would make any difference vs using the current beta version which is what was used to originally create this file?

@cryanhorner are you able to save the file to your local HD or it's giving you the disk error anywhere?

It could very well be that it has corrupted the file/storage when it crashed while accessing the NAS.

Hey again,

So I gave the unmount-remount move a try, as well as a couple things from the links you added, including opening a composite version of the file (it does still allow me to open this file, both normally and composite), in the hopes that if I could just make some change to the file and save again, it might overwrite the broken version.  It allows to me to make changes to the file, but I cannot save them due to "disk error" (same error message composite or not).

I also tried save-as with the existing name, so that it would try to overwrite the previous file, but no luck there.  The last thing I haven't tried yet is to see if I can access the file on the drive from some other computer to delete it, although I remember that once when this happened before I tried that on an old PC laptop I had at the time, and it appeared to work, but then when I was back on the Mac the file just showed back up again as if it had never been deleted.

Is there anything that I can potentially do with the file while it is opened in photoshop that might help?  I can't imagine what though.

checked the other minor details as well, file extension matches the file type, I personally have read/write permissions, fil is not locked, etc.

@cryanhorner is is suggested to always work with Ps and local files:
https://helpx.adobe.com/photoshop/kb/networks-removable-media-photoshop.html

"Technical Support strongly recommends working in Photoshop directly on the local hard disk. To prevent data loss, save files to your hard disk first. Then transfer them to the network or removable drive in the Finder or in Windows Explorer. To retrieve files, copy them in the Finder or in Windows Explorer from the network or removable drive to your hard disk. You can then open the files in Photoshop. This workflow avoids problems that occur when network system setups or removable media device drivers are incompatible with the operating system or Photoshop."

Trouble shooting:

"Different factors can cause problems with application performance, including memory conflicts among device drivers, damaged or conflicting files, operating system software or hardware problems. If you work directly from networks or from removable media and you experience problems, use the suggestions below to troubleshoot.

Disclaimer: The following suggestions are provided as a courtesy. Adobe Systems does not provide support for networks and removable media.

• Make sure that you use the latest version of Photoshop. Update Photoshop using the Creative Cloud Desktop Application.
• Transfer the file from the network or removable disk to a local hard disk, and then open it in Photoshop.
  
  Note: Once a file has artifacts, they  can be permanently a part of the image data. Replicate your image in a new file using the local hard disk. See File recovery troubleshooting for further assistance with potentially damaged images.
   
• Use another computer connected to the same network or type of removable media.
• Check with your network administrator about known issues with the network or changes in network configuration (for example, updated drivers or changed access privileges).
• Make sure that Photoshop is installed on and running from a local hard disk, and try to replicate the problem. If you can, troubleshoot the problem on the local configuration. If you can't, your problem could be caused by working from removable media or a network."

Per your question on unmounting, you can either drag the icon to the trash or click on the eject icon in the finder sidebar.

Thanks,

Cory - Photoshop Product Manager

Pardon my ignorance, Cory, but is unmounting the drive the same process as disconnecting from it (which happens any time the laptop is off of my home network) or is it a different process?

I did a quick search for procedure, but was directed to go to the disk utility to unmount a network drive, however my network drive doesn't seem to appear there (attached screenshot) although I am currently connected to it.  Would just dragging the drive icon on my desktop to the trashcan accomplish the same?

Hi @cryanhorner curious what happens if you unmount then remount your NAS to see if this possibly releases the "in-use" flagging?

Thanks,

Cory - Photoshop Product Manager