Results 1 to 7 of 7
  1. #1
    New Lounger
    Join Date
    Dec 2015
    Posts
    2
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Why is my windows backup so large?

    Why is my backup over 470 GB, when my O.S. and files only equal about 110 G.B. ? I am using windows built in backup tool. On windows 10 OS. I have tried deleting the backup, and starting fresh, but always get an extremely large size for the backup. The drive the OS is on is only 240GB ssd. But am only using apprx 110GB of it.

    Update-

    Strange,

    After windows 10 last major update I noticed my backup files where gone!? Ran backup again and everything came out to a normal size. Do not know what the issue was.
    Last edited by walkjp1; 2015-12-12 at 02:24. Reason: Update

  2. #2
    WS Lounge VIP
    Join Date
    Dec 2009
    Location
    Earth
    Posts
    8,162
    Thanks
    47
    Thanked 976 Times in 906 Posts
    How do you know it's that big?
    What sort of backup are you doing?
    What are you backing up to?

    I would try the free version of Macrium Reflect to compare backup size.

    cheers, Paul

  3. #3
    Super Moderator BATcher's Avatar
    Join Date
    Feb 2008
    Location
    A cultural area in SW England
    Posts
    3,413
    Thanks
    33
    Thanked 195 Times in 175 Posts
    Try something like TreeSize Free (or other similar software) to see which folders contain large files. You can drill down to lower folders. Best to start it by running as Administrator.
    BATcher

    Time prevents everything happening all at once...

  4. #4
    Super Moderator jwitalka's Avatar
    Join Date
    Dec 2009
    Location
    Minnesota
    Posts
    6,792
    Thanks
    117
    Thanked 798 Times in 719 Posts
    Do you have multiple disks and have the boot record on a different drive than the OS drive? If this is the case, the Windows system backup will back up both drives.

    Jerry

  5. #5
    3 Star Lounger
    Join Date
    Nov 2012
    Location
    Maryland, USA
    Posts
    362
    Thanks
    15
    Thanked 11 Times in 11 Posts
    @walkjp1 - I had the same situation on my Win 7 machine and finally found that my E: partition had a System Restore allocated space set to 23%. This was making it use over 141 Gigabytes. I set it down to 1% (the lowest it will go) and that reduced the space dramatically. You can check this by going to System Protection and clicking on Configure. You might also want to check your Pagefile size (swapfile) and Temporary Internet file allocated size. If Win 10 still allows you to do it, make it so you can see all files including "Hidden protected operating system" files. You can do this in Windows Explorer or whatever Win 10 calls it and click on Tools - Folder Options - View tab, and uncheck "Hide protected operating system files". You may get a complaint from windows that this is unsafe but click apply and okay. After you check the pagefile file size in C drive you can recheck that box to hide them again. It is safer to have them hidden. Hope this helps.

  6. The Following User Says Thank You to CEScott For This Useful Post:

    jrclen (2015-12-29)

  7. #6
    New Lounger
    Join Date
    Dec 2015
    Posts
    2
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Update-

    Strange,

    After windows 10 last major update I noticed my backup files where gone!? Ran backup again and everything came out to a normal size. Do not know what the issue was.

  8. #7
    Silver Lounger RolandJS's Avatar
    Join Date
    Dec 2009
    Location
    Austin metro area TX USA
    Posts
    1,720
    Thanks
    95
    Thanked 124 Times in 121 Posts
    If your Windows Backup also includes incremental and/or differential backing up, of which I have never done - so can't tell you how to tweak such backups, your backups will have many versions of many files, all of that adds up.
    "Take care of thy backups and thy restores shall take care of thee." Ben Franklin revisited.
    http://collegecafe.fr.yuku.com/forum...-Technologies/

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •