Auto-Tune and issues downloading large files form SharePoint Online

Some O365 clients may experience errors or disconnects or slowness with uploading/downloading large (>10MB) files from SharePoint Online. There is a workaround on client side. Need to disable Auto-Tune.
This will stay at some small % for a long time :

 Then eventually:


To fix this, from a command prompt ->
netsh int tcp set global autotuninglevel=disabled  

Shout out: http://sharepoint-community.net/profiles/blogs/o365-sharepoint-online-not-able-to-download-upload-large-file

Resolve Sync issues with OneDrive for Business

I recently had an issue that I still do not understand the root cause of. My OneDrive for Business folder was not syncing and certain files displayed with a red X icon, instead of the happy green Synced icon. I Uninstalled/Reinstalled 1D4B but still had the issue.

 I also found some un-synced files in the Archive folder at:
 C:\Users\John Mongell\OneDrive for Business Archives\Thursday, September 25, 2014 - 1\OneDrive

Whats more, each time I tried to access the 1D4B folder in Windows Explorer, a popup for each file would quickly appear and disappear: It said OneDrive for Business is not responding. Try again in a few minutes.

So, At last, I surfed to the file location C:\Program Files\Microsoft Office 15\root\office15
And typed Groove.exe /clean /all Then I restarted Groove (OneDrive) by simply typing groove.exe 

This caused it to start correctly and asked me to resync my local library.
 I confirmed the file locations and resynced, all is good now!

Hope This Helps.