update problem site is down

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My current site uses concrete 5.6.3.5, but now it is no longer possible to upload more files at once. Is there any solution? Can I update the site to a higher version to solve the problem? I don't know how to do that without losing all the data in my site. It is down .

 
deepvyas replied on at Permalink Reply
Hi Ginger ,
I can look into the issue and update back with findings
Please check PM sent

Regards
Deep
dhdesign replied on at Permalink Reply
dhdesign
You can upload multiple via FTP incoming files, or you can update to 5.7 and above