I have MS Office 2013 Installed on Windows 8.1 Pro PC 

Excel was working so smoothly previously. Within a week I started to face a strange problem Excel is taking too much time to save any file on network this is particularly happens only in network files.

Please give some suggestion as i am unable to work on network files.

Hi viodjames,

Could you tell me if it works fine when opening Excel file? Is there any array formula within your workbook?

First please try to disable your antivirus software and check the issue again.

And the issue also might be related to Internet Explorer performing a search of network drives and your local area network and any disconnected network drives or LAN search issues will hang the loading of your Excel spreadsheet. Here is how to stop Excel from browsing your LAN / Network drives when you open an Excel spreadsheet on your local hard drive:
1. Start Internet Explorer
2. Go to "Tools" menu
3. Go to "Internet Options"
4. Go to "Security" tab
5. Go to "Local Intranet"
6. Click on "Sites" button
7. Uncheck "Automatically detect intranet network"

http://support.microsoft.com/kb/313937/en-us

This issue may also occur if you are using the Encrypting File System (EFS) to secure the Temporary Internet Files folder. In this situation, please refer to this article to help you:
http://blogs.technet.com/b/the_microsoft_excel_support_team_blog/archive/2014/05/05/slow-saving-of-office-files-to-a-network-server-using-efs.aspx

Please try these methods and let me know if they work, I am glad to help and forward to your reply.

Regards,

Emi Zhang
TechNet Community Su

Hi,

There was an issue with 2003/2007.