N900 Central missing files

Please help me… ALL of my documents have just disappeared from mynet N900 central. The media files are still present, but word, excel, adobe files have all gone. I have just installed a clean copy of windows 10 into one of my pcs, could that have had an effect?

I doubt it. so turn off that PC and reboot router and see if you can see the missing files when all is working again. If they are, then reboot the PC you suspect. Are files showing on other PCs and this one?