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I'm not sure if this hardware is recent or not.<br />
But I think this link should be useful for you<br />
<br />
<a href="https://forum.synology.com/enu/viewtopic.php?t=90690" rel="ugc">https://forum.synology.com/enu/viewtopic.php?t=90690</a><br />
<br />
This is what I think:<br />

<blockquote>
I've had this same problem with CS not syncing what turned out to be a read-only file (thanks for the fix!). I removed the read-only flag and it sync'd fine.
</blockquote>
<br />
Which leaves us thru here:<br />

<pre><code id="code-20-42824539-1">attrib -r c:\folder\*.* /s</code></pre>
<br />
Source: <a href="https://superuser.com/questions/653951/how-to-remove-read-only-attribute-recursively-on-windows-7" rel="ugc">https://superuser.com/questions/653951/how-to-remove-read-only-attribute-recursively-on-windows-7</a><br />
<br />
Try to run that on the problematic files and check if it fixes the issue.
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I'm not sure if this hardware is recent or not.
But I think this link should be useful for you

https://forum.synology.com/enu/viewtopic.php?t=90690 [https://forum.synology.com/enu/viewtopic.php?t=90690]

This is what I think:


> I've had this same problem with CS not syncing what turned out to be a read-only file (thanks for the fix!). I removed the read-only flag and it sync'd fine.


Which leaves us thru here:


attrib -r c:\folder\*.* /s


Source: https://superuser.com/questions/653951/how-to-remove-read-only-attribute-recursively-on-windows-7 [https://superuser.com/questions/653951/how-to-remove-read-only-attribute-recursively-on-windows-7]

Try to run that on the problematic files and check if it fixes the issue.

Director of Member Experience  

Stacy Richard

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<div class="content wysiwyg-content">
I have a customer on a Synology 916+ with Cloud station Sync. &nbsp;Laptop isn't getting ALL of the files. &nbsp;So, customer gets frustrated when he goes on the road to find that the files he posts on the server aren't showing up on the laptop. &nbsp;The agent doesn't continue syncing and believes that it's finished syncronizing. &nbsp;I've seen complaints on the Synology forum with no specific answers.<br />
<br />
Anyone have experience with this problem?
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I have a customer on a Synology 916+ with Cloud station Sync.  Laptop isn't getting ALL of the files.  So, customer gets frustrated when he goes on the road to find that the files he posts on the server aren't showing up on the laptop.  The agent doesn't continue syncing and believes that it's finished syncronizing.  I've seen complaints on the Synology forum with no specific answers.

Anyone have experience with this problem?

Synology - Sync troubleshooting

Synology

Network-attached storage is a file-level computer data storage server connected to a computer network providing data access to a heterogeneous group of clients. The term "NAS" can refer to both the technology and systems involved, or a specialized device built for such functionality. 

synchronize

Troubleshooting is a problem-solving process of evaluating faults that occur in a mechanical or electronic system. Steps often include recreating the problem and then trying alternative and creative solutions in order to fix the situation. Troubleshooting is deployed when software or hardware are rendering abnormal responses or remain unresponsive.

Troubleshooting

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Hardware

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Storage

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