I suggest you ...

Enable differential sync (only sync parts of the files that changed)

Today OneDrive implements differential sync only for Office files (that is, syncing only the changes made to the file, instead of the entire file). It would be a significant improvement for this capability to work against any files in OneDrive - so smaller changes to a file would result in less data needing to be transmitted, meaning less time to sync changes back and forth, and more efficient use of network bandwidth.

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    PJD shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

    143 comments

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      • Anonymous commented  ·   ·  Flag as inappropriate

        Please add this benefit. When One Drive is operating, I can not do anything else on the computer. It takes all the band width.

      • Sprow commented  ·   ·  Flag as inappropriate

        This feature would be very worthwhile - especially for regular data (like repeating fixed size records, or large bitmap images) where most of the file hasn't changed.

        An API that's equivalent to being able to open in existing file (fopen) moving to the offset that changed (fseek) and writing the changes (fwrite).

        I can see that for more complex data streams, like a big JPEG photo, that even a few pixels of change would result in a totally different run of bytes so would be much more complex. The API would need a means of moving unchanged blocks up (without having to download and re-upload them) on the server then filling in the gaps with the above fopen-fseek-fwrite operations.

      • Adam commented  ·   ·  Flag as inappropriate

        This would be the single biggest thing that would improve OneDrive for me, especially because it doesn't look like faster internet is going to be available in our area any time soon.

      • Taylor commented  ·   ·  Flag as inappropriate

        This would be HUGE for those of us who frequently travel to/live internationally in areas with poor internet connections! Spending all my votes on this suggestion.

      • Pedro commented  ·   ·  Flag as inappropriate

        Ridiculous that this has not been implemented yet... everyday I upload 2GB PST file just because I got 2 new emails in my outlook inbox..

      • Rafael “R4to0” Maciel commented  ·   ·  Flag as inappropriate

        They promised this feature (in the 2017 roadmap) and haven't done yet... That's disrespectful to customers. Not worth subscribing to the paid storage.

      • Bard commented  ·   ·  Flag as inappropriate

        Is this even actually getting considered? 4 of the top 5 requests in the feedback are about improving sync functionality and nothing has been changing in the released version in 4 years. No differential sync, no lan sync, no duplicate sync, no sync for mobile, nothing.

      • Dawie commented  ·   ·  Flag as inappropriate

        Above it states that differential sync has been implemented for Office files. Does this mean it should already work for Outlook PST files?

        Anyway - Agree this should be a must for all files - makes absolute sense...

      • Latch Kostov commented  ·   ·  Flag as inappropriate

        I just found out that I chewed up all my bandwidth and reached my data cap, because I had a program running which was located on the desktop, and it created and regularly updated a very large log file. This log file exceeded 30MB, and was being uploaded every single time it changed...I assume the entire thing.... I have never used my entire 1 TB of monthly bandwidth until today.

      • Anonymous commented  ·   ·  Flag as inappropriate

        Completely ridiculous that Microsoft has not implemented this, considering Dropbox has been able to do this for years!!!!!

      • Geoff Faulkner commented  ·   ·  Flag as inappropriate

        This was on the Q2 roadmap for OneDrive, but it's now Q4. Do you have any update to this? Differential sync is a very necessary feature.

      • Uli André Armbruster commented  ·   ·  Flag as inappropriate

        As long as the so called delta sync is missing, OneDrive is no option. Dropbox supports this for many years now. If you're using truecrypt/veracrypt container, always the full size has to be transfered. No chance with a 10 GB container :(

      • Anonymous commented  ·   ·  Flag as inappropriate

        October, 2017: I'm glad to FINALLY have files on-demand back, but I've been waiting for incremental sync even longer. Any updates?

      • Anonymous commented  ·   ·  Flag as inappropriate

        Actually this feature is supported by Dropbox and one of the main reasons because a lot of users I know don’t like OneDrive (many don’t know technically why by they say sync is dramatically lower in OneDrive).

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