File sharing with windows server 2012 problem

Question

hi all

I'm having a problem with Windows Server 2012. Windows Server 2012 is used as a file sharing system for clients. Each client is given access to its own folders. The problem now is that files with the .rar extension cannot be copied and pasted to the client PC's local drive. The error "Make sure you are connected to the network and try again" appears, only for .rar files with a size of 700 kbps.

Thank you
Azhar

Answer 1

Hi MUHAMMAD AZHAR FADHLUR RAHMAN

This isn’t caused by the .rar format itself; it’s almost always an on‑server content filter blocking archives at a size threshold. Check if File Server Resource Manager is installed and enforcing a file screen that includes .rar under File Screening Management; remove or adjust that rule and retest. If FSRM isn’t present, temporarily disable real‑time antivirus on the server and retry; if it succeeds, add exclusions for the share path or .rar per the vendor’s guidance. Ensure the server is fully patched and clients use SMB 2/3; verify with Get-SmbConnection and update NIC drivers if needed. Confirm the failure isn’t quota‑related by checking the share’s quotas and the client’s free space. Test copying the same .rar to a different share or to the server’s local disk to isolate whether the filter is per‑share or global. If the error appears only at ~700 KB, that strongly indicates a screen or AV threshold rather than networking or permissions. Avoid changing SMB signing or oplocks unless you identify a filter driver conflict, and document any AV/FSRM changes.

I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!

Harry.