(2026-07-23)

Download link

Important Note

1. After installing this update, you will not be able to downgrade to a previous DSM version.
2. This update will restart your Synology NAS.
3. If auto update does not run, perform a manual update in Control Panel. Before updating, follow the instructions and complete the required actions to ensure success.
4. To uphold our commitment to quality, every DSM release undergoes rigorous validation. To ensure optimal stability, the models listed below will not receive this update on your device and will remain on their most suitable version. You can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
   • FS Series: FS3017, FS2017, FS1018
   • XS Series: RS18016xs+, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, RS18017xs+, DS3617xs, DS3617xsII, DS3018xs
   • Plus Series: RS2416RP+, RS2416+, DS916+, DS716+II, DS716+, DS216+II, DS216+, DS1817+, DS1517+, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+, DS718+, DS218+, RS1219+
   • Value Series: DS116, DS216, DS216play, DS416, DS416play, DS1517, DS1817, DS418play, RS217, RS816
   • J Series: DS216j, DS416j, DS416slim, DS419slim, DS418j, DS218j, DS119j
5. Enhanced KMIP certificate handling to comply with updated certificate issuance policies for public certificate authorities (CAs). KMIP client authentication now requires certificates issued by a private CA. Synology default certificates, the QuickConnect certificate, and certificates issued by public CAs (e.g., Let's Encrypt, SSL.com, and Sectigo) are not supported for KMIP client authentication. For detailed configuration instructions, refer to this article.

Compatibility & Installation

1. To ensure compatibility, the following packages will be automatically updated or will require a manual update to a compatible version: SnapshotReplication.

Fixed Issues

1. Fixed an issue where a USB UPS could not be recognized after updating to DSM 7.4.
2. Fixed an issue where USB devices could not be used on certain models after updating to DSM 7.4.

Notes:

• This version is released in a staged rollout.

Title basically says it all.

Bought a 1522 and tried to put in only stuff I have on hand

So I pull the 2.5Gbe adapter from my work replicator and run the script. Set lan5 as primary network, run a script at start up
to make sure the adapter is on. So everything should work but I only get less than 1Gbe speeds with all fast adapter on the same switch.

What am I missing here ?

I could remove the T1 mini from my 923 but that sort of defeats the benefits of it being all SSD.
Or just pay for a second T1 mini?

I have a DS1520+ with 5 20TB drives in it. its currently sitting at 80% full. i thought i could add another volume by attaching a JABD to it. but i cant (i want the raid function) should i buy an expansion unit? or do i get a new unit? it be synolgy, Ugreen or another brand. if i get a new unit how do i go about making the two units talk and play nicely with reading each others data?

I'm not sure if it can be plugged in the NAS to get it recognized as a basic UPS over USB. I've seen support for about 4 NAS models but I don't need an app, just basic UPS support.

Any feedback? Is that a bad idea?

I just ordered for testing so my boss can look at the interface in a Synology DS124 and loaded the Surveillance app on it. Trying to add a Reolink RLC-520A (which seems like a nice little turret camera, btw). I believe I got ONVIF configured on the camera ok, everything is default settings. I add it to the Synology, it passes the config test, get a green checkmark, and even see a thumbnail live image or something, and then seconds later it shows "Disconnected". I open it up in Edit view, and do a Test of it, and it fails with the usual unhelpful check everything sort of comment. Everything is in default mode, but I did change TCP over to UDP with no change.
Is there some basic thing I'm missing?
I'm on a Unifi switch, and there is a Unifi Protect NVR attached to it as well, but it shouldn't have anything to do with it.
Any help would be highly appreciated, thank you!!

I have a 1520+ NAS, purchased in June 2021 that I use for media storage and work backup with 4 drives in raid 5. Last night it suddenly shut off (I had backed up some files to it during the work day, but when I went to grab something in the evening it was off) and it seems to be totally dead. The power brick has a green light, but the unit itself won't boot, no lights, no fans, no nothing. I reached out to Synology support and they basically said "seems like a hardware failure, too bad, buy a new one".

Does anyone think theres any chance its something like the power brick and not the unit itself? Even with the light illuminating, maybe it failed and isn't supplying power? Any known issues that are repairable?

I'm not really inclined to purchase another Synology if they have 5 year lifespans, but maybe I got unlucky. I went with Synology in the first place because I'm not super interested in dealing with tech and just wanted something that worked and was reasonably easy to manage.

As the title says, I am on the lookout for a dual 10Gbe ethernet network PCIe card for my DS1821+ NAS.

The official supported Synology ones are a little pricey and would prefer something a little cheaper.

Thanks

Synology only certifies drives up to 16TB for the DS916+. I always assumed this was typical vendor laziness in not certifying newer, larger drives on older hardware but I've never been willing to put my theory to a test. Is the actual maximum drive size known? Is anyone running larger drives?

I want to get a Diskstation to have offsite backups of our current 8 bay model. Do I need to match the number of bays or can I get a smaller machine with just as much or more disk capacity?

I am in Finder and I browse the files in my NAS. I right click and zip a folder. Where is this compressing takes place? On the NAS ? Or my mac does all the work?

What if I use a utility like Keka and not the mac's embeded zip utility.

What is the best way to compress some folders ?

Thank you!

I deleted the content of a shared folder that was being used for veeam backups on a PC I no longer have. I disabled snapshots on that shared folder a while ago, deleted the folder content, made sure the recycle bin is not enabled on that share, check again there were no outstanding snapshots... and the space doesn't show up. Anybody can hint what could be happening? is there any space reclamation process that I can run? Thanks in advance. ---- Solved, it was because of the space reclamation schedule, as u/jonathanrdt pointed. Thank you all for your input anyways.

I found an open source tool on dashcam talk that lets you automatically back up dashcams to S3... we have a few vehicles so it looks great to manage all our footage (https://dashcamtalk.com/forum/threads/dashkeep-add-cloud-backup-to-almost-any-wifi-dashcam.61484/)

In the video the guy uses Cloudflare R2 but he also says we can use local storage/NAS - does synology support S3 natively or will I have to go about setting up something like Minio?

Not only was Synology’s decision to force us into their overpriced storage a bad move, but having zero stock for a known‑to‑fail DS918+ AC adapter is insane, especially when these adapters are notorious for dying.

Now we’re told to wait 4–5 weeks for a “made‑to‑order” 100W_3 adapter? That’s the last straw for us.

Our company, with over 2,000 accounts, will move away from anything carrying the Synology logo. We’re already on Unifi, so we’ll either switch to their solution or build our own TrueNAS systems.

And before someone jumps in to nag us about using DS918+ units in an SMB environment: we use them for accounting staff across multiple locations, and at the time, before Synology turned into this kind of company, it made perfect sense.

I am running Home Assistant on a VM with 2 USB devices connected to my DS220+ one for thread and one for zigbee. This used to work fine for years until I updated to DSM 7.4. Using A VM, I never experienced any driver issues, as the VM OS handles those.

Since 7.4 was installed, the front USB port no longer accepts any device other than storage. I know 7.4 isn't being pushed out yet, but as another security update was still pending, I figured I'd get it out of the way and do it manually.

Switching the front device to the rear makes it show up again, so the issue is definitely with the front port. Using lsusb I can still see the device, but that's about it. It is not showing in the info center or in the Virtual Machine Manager. A hub also doesn't seem to work. (Although both devices do show up when used like that)

Anybody have any ideas?

UPDATE: After creating a support ticket and an AI generated response suggesting this as a known issue, I requested for further assistance, as the AI response didn't contain a solution.
Support was able to install a patch on my device, and it did fix the issue. The fix would be included in new DSM versions I was told.

Edit: Problem Solved - Synology issued me a new license :)

Upgraded my DS1815+ from DSM 6.something to 7.1.1. Didn't go well and I had to reset the DSM configuration and rebuild my users and reconfigure everything from scratch but at least all my user files are intact.

Setting up the cameras again in the Surveillance Station and it is saying I only have two camera licenses whereas I previously had five cameras running and I think another spare licenses or two left to use.

Is there any way to recover the licenses I already had and paid for?

Hey everyone!

I'm new here and I'm planning to buy a DS725+ for storage, website hosting(!), some Docker containers with databases for websites, running game servers to play with friends (if it's capable).

I really like that it supports up to 32 GB of RAM, but I'm a bit concerned about the CPU and the limited list of supported HDDs (if that's still the case).

My current plan is to install two 12 TB HDDs and upgrade the RAM to 32 GB.

Could you share the main pros and cons of this model? Also, if possible, I'd appreciate recommendations for compatible HDDs, RAM, and SSDs.

Thanks in advance!

I need to change the password for an S3 bucket in a HyperBackup backup task but the UI doesn't allow it. I see the remote_secret field in synobackup.conf but it's clearly encrypted/hashed. Anyone know the algorithm or a util to convert a new password string to the required format.

To be clear, this isn't about the encryption key used to encrypt a backup, just the remote_secret field in the synobackup.conf file.

Thanks.

I'm trying to install the package for Sonnar v4 onto my synology.

I get an error, that port 8989 configured for the package is either in use by another service or reserved for system use.

I ran a check (netstat -an) and nothing comes back with port 8989 being used.

I get the same error for port 6767 for bazaar, and 8686 for Lidarr

Any help is appreciated.

I'm close to buy a Synology DS925+ .

2 X HDD 5400 raid 1 to start.

Router wifi5

Just so that i have an idea. Let's say I initiate a transfer from my phone (pics, videos, docs...) 10 gigs. How long it would take.

I'm not asking for an exact answer but a average answer.

This answer will give me an idea for everything else.

Will it takes like hours, days, minutes..

What you think?

This is a big purchase so I don't want to screw up.

Hey!

As the title states. I’ve been in this darn room every day for three years, didn’t even think about it. But now in retrospect, I hope i haven’t damaged my body longterm due to all VOC fumes.

I’m getting rid of my APC due to the fumes, but I’m also too scared to run my NAS without an UPS, and there are no alternatives to UPS that I know of.

What are your guys’ recommendations?

Thanks a bunch

It seems that Synology might be trying to get rid of people that use their products for media servers. They are changing the CPUs to either non integrated graphics or the chips that have it, they are removing hardware transcoding with their software. I mainly use my Synology units (3) for media servers, backups and mass storage.

My question is, should i stop updating my units? I fear Synology will release a DSM update that removes hardware transcoding from all units. Currently i made sure to have all my units with the Intel processor for exactly this purpose.

In my newly acquired 1522+ I will put 4x10TB hdds and a 1TB SATA SSD as the volume for all apps.

What would be a good NVMe choice for just storage if I want to move all app's to the internal NVMe drive running DaveR's script? Volume size 250-500GB? Doesn't have to be blazing fast, just reliable.

I looked at WD Red and in 250-500GB they are sort of affordable but are out of stock with an unknown delivery date. My all SSD 923+ uses just WD Reds so that is my go to brand, despite the price increases in the last year.

I currently have a DS418 and backing up with Synology Drive Client. Both have the latest updates installed and I am on a MAC.

Not long ago, the Synology Drive Client stopped detecting the NAS on the local network. It is stuck in a perpetual "connecting" loop and no longer backing up / syncing.

I can log into the NAS via browser using it's dedicated IP. I can also use SynologyAssistant app to see the NAS on the local network and it shows me the same dedicated IP. However, Synology Drive Client can't see the NAS. Even if I put in the dedicated IP address into it's setup window.

Some generic answers I am getting online is that port forwarding should be setup. But I'm not sure how that makes sense when I am using a dedicated IP address on a local network.

Anyone know a solution to this?

I purchased my NAS DS1517 one year ago, but never really used. What could be the ten most interesting thing to do with it. I already have my pictures saved on it, I also have movies, and music.

I am interested to dig into it and learn

Thanks !