# FLAC files on NAS causing hang
**URL:** https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364
**Category:** Mac
**Created:** [June 25, 2023, 3:40am UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364 "2023-06-25T03:40:48Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@irie27](https://community.mp3tag.de/u/irie27)
#### Post date: [June 25, 2023, 3:40am UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/1 "2023-06-25T03:40:48Z")
I'm using 3.21 on Win 10 and have run into an issue. Lately the program will hang when writing tags to FLAC files. I can't get MP3TAG to quit even when using Task Manager and choosing to End Task. MP3TAG acts like it has quit, but hasn't. The program won't start again until a reboot of the system. I've tried using the MACOS version as a test to see if it's just related to Windows and the FLAC files still create an error. The description of the error is being reported as "can't write to file, you don't have permission". I checked the file permissions (they reside on my Synology NAS) and the permissions are correct.
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### Author:  [@poster](https://community.mp3tag.de/u/poster)
#### Post date: [June 25, 2023, 4:54am UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/2 "2023-06-25T04:54:24Z")
And what happens if you move some of these files to a local drive and try to write to them?
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### Author:  [@irie27](https://community.mp3tag.de/u/irie27)
#### Post date: [June 25, 2023, 11:33am UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/3 "2023-06-25T11:33:57Z")
Tried that on the macos version, that's when I received the "can't write to file, you don't have permission" error.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [June 25, 2023, 11:41am UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/4 "2023-06-25T11:41:36Z")
see e.g. here:
> [@Cannot access URL via secure bookmark](https://community.mp3tag.de/t/cannot-access-url-via-secure-bookmark/51508):
>
> Hi there, I am having trouble changing any Tag using mp3Tag for mac in a specific folder on my NAS-drive - while using another folder on the same NAS drive I don't have any problem at all. One difference ist that the one i cannot tag is used by "BluOS" so that the mac might think it is "mounted". To be clear - I can read every file using the mac. But I can't save any changes. Using mp3 Tag for windows has no trouble at all. Has anyone an idea how to get rid of the "Cannot access URL via sec…
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### Author:  [@irie27](https://community.mp3tag.de/u/irie27)
#### Post date: [June 25, 2023, 5:11pm UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/5 "2023-06-25T17:11:38Z")
I copied the problem flac folders over to the local machine and it worked. I've rebooted the Synology thinking that could be an issue. I still need to reboot the network to see if that could be an issue. I've had to take extra steps to tag/move the files but it's done. Not as smooth as MP3TAG has made it in the past (like 2 days ago). Great program!
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [June 25, 2023, 5:16pm UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/6 "2023-06-25T17:16:29Z")
Have you tried the way with deleting the secure bookmarks?
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### Author:  [@irie27](https://community.mp3tag.de/u/irie27)
#### Post date: [June 29, 2023, 10:28pm UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/7 "2023-06-29T22:28:33Z")
I don't think that's relevant in this case.
The macos version allowed to see what the error was. Some of the FLAC files are pretty large.
I've thought about moving the files locally, and move them back to the NAS, but in total that would be over 3TB. I'd rather just write the tags on the NAS files.
I may just need to deal with it, but MP3TAG has been a great resource!
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [June 30, 2023, 5:47am UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/8 "2023-06-30T05:47:21Z")
> [@irie27](#):
>
> The description of the error is being reported as "can't write to file, you don't have permission". I checked the file permissions (they reside on my Synology NAS) and the permissions are correct.
[BackLog](https://eternalstorms.at/backlog/) is an option to gain some insight to what's happening on the Mac. You can set the process to Mp3tag and send the logged events.
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### Author:  [@irie27](https://community.mp3tag.de/u/irie27)
#### Post date: [July 1, 2023, 12:05pm UTC](https://community.mp3tag.de/t/flac-files-on-nas-causing-hang/61364/9 "2023-07-01T12:05:23Z")
I've done more troubleshooting, and may have figured out what's causing the hanging. I've tried both the Windows & macOS versions. The Windows version hangs when trying to add album art to certain FLAC files. When attempting to write album art to the same FLAC files in macOS I receive the error "cannnot write tags to file". I then copied the troublesome files to my MBP. I was thinking the temp folders and temp file were causing the hang....they weren't.
I'm thinking now it's my Windows install and an issue with the Synology NAS. Eventhough the Windows machine has a wired connection, it's like writing the album art causes the NAS to slow to a crawl. I don't know what else it could be. Thank you for your assistance.