Since I upgraded Windows from Version 8 to 8.1 my Skydrive (Excel) files are Read Only, which prevents updating them. Typically I will save a copy to a SDXC card, also to the C drive and then to the Skydrive which is the default drive to save to in Office 365. It also seems that many of the files are shown as available offline only which makes me think that they are not on SkyDrive. I get a "must be administrator to modify file" message,  (I am) and I have tried to change the attributes to the folders to not be read only. Every time I go through the process and retry to save, the files revert to read-only status.

I have tried to access the files from another machine and they do not seem to be on the SkyDrive. I can copy using File Explorer however this is cumbersome and requires leaving Excel to go to another app certainly not very convenient and likely fraught with potential for error. What was changed? How do I get back to the original process?