Windows 10 partition size after format


  1. Posts : 7
    Windows 7 Ultimate x64
       #1

    Windows 10 partition size after format


    Hi all,
    I would like to create a round 700GB size partition. I know that after formatting there will be some unavailable space (system files, etc.) on it.
    What size do I have to set in Disk Management, if I want that partition to be exactly 700,0GB in the explorer after formatting?
    Thanks,
    hazazs
      My Computer


  2. Posts : 35,400
    Win 10 Pro (21H2) (2nd PC is 21H2)
       #2

    Hi, your specs say you have Win 7.

    Your question needs clarification, please.

    Are you...
    - upgrading from Win 7?
    - clean installing Win 10?

    To which partition are you referring?
    - a data partition?
    - the Windows partition
    - some other partition?

    Please note that you clean install Win 10 to unallocated space on disk.
      My Computers


  3. Posts : 11,203
    Windows / Linux : Arch Linux
       #3

    Hi there
    It's never a good idea to have everything in a big Windows partition -- keep the OS and installed programs e.g Office if you have it in its own partition and all your own user data e/g movies, photos, documents, music etc in a separate partition. That way if you re-install Windows you don't have to recover all your data every time --also the Windows partition can be made a lot smaller allowing for much quicker backup and restore times.

    A typical Windows 10 partition with the usual run of programs installed shouldn't really run to around more than 70GB at the most -- that also allows enough space for upgrading to a newer Windows build via Windows update. That means you'd have say 600GB as a partition "D" on your drive as well as say 100GB as your "C" drive -- you can store a windows image backup easily on the "D" drive too. (Use a free program like Macrium Free).

    Cheers
    jimbo
      My Computer


  4. Posts : 2,763
    Windows 10 Home x64
       #4

    Depending on how much software you need to install I usually create system partitions 50-75GB for x86 and 100-200GB for x64

    On an x86 laptop I have, w10 is just 12GB+ in size with everything installed, including MS Office.
      My Computer


  5. Posts : 46
    windows 7 pro
       #5

    Isn't it as simple as calculating it in megabytes, where 1gb is 1024MB so 716 800 mb? this should show exactly 700gb partition in explorer, regardless of how much free space is on it and how much is used by filesystem and journal files.
      My Computer


  6. Posts : 7
    Windows 7 Ultimate x64
    Thread Starter
       #6

    dalchina said:
    Are you...
    - upgrading from Win 7?
    - clean installing Win 10?

    To which partition are you referring?
    - a data partition?
    - the Windows partition
    - some other partition?
    I plan to make a clean install on an 1TB SSD, and I would like to separate a round 700GB partition for the personal files.

    jimbo45 said:
    Hi there
    It's never a good idea to have everything in a big Windows partition -- keep the OS and installed programs e.g Office if you have it in its own partition and all your own user data e/g movies, photos, documents, music etc in a separate partition. That way if you re-install Windows you don't have to recover all your data every time --also the Windows partition can be made a lot smaller allowing for much quicker backup and restore times.
    jimbo
    That's what I exactly want to do. Splitting an 1TB SSD (usable size is 931,51GB) to two partitions:
    C: 231,51GB for OS
    D: 700,00GB for personal data

    kokodin said:
    Isn't it as simple as calculating it in megabytes, where 1gb is 1024MB so 716 800 mb? this should show exactly 700gb partition in explorer, regardless of how much free space is on it and how much is used by filesystem and journal files.
    Sadly not! I have created a partition sized 716800MB. It showed correctly 700GB in Disk Management, but after formatting it Total Commander shows only 699,9GB (Yeah I know, Y-generation problem..). Then I have made a partition sized 716900MB. Disk Management: 700,10GB, Total Commander: 700,0GB.
    You could say then you have got your answer. But I have tried this with the current 1TB HDD (I haven't buy the SSD yet). So will the SSD behave the same with these numbers?
      My Computer


  7. Posts : 35,400
    Win 10 Pro (21H2) (2nd PC is 21H2)
       #7

    You can create a partition on your SSD (which will be for data files as you say).
    Then you can install Win 10 to unallocated space.

    You could do that by booting your PC from
    - a live boot disk such as Kyhi's - top of the Software and Apps section
    or
    - the boot disk of a 3rd party partition manager
    or
    - connect your SSD to a PC (via USB e.g.) and thus create the partition

    Or..

    You can install Win 10 on the SSD, then shrink the Windows partition and create an additional partition.
    Minitool Partition Wizard for example. (use 3rd party partition managers if making changes to C: ).
      My Computers


  8. Posts : 46
    windows 7 pro
       #8

    hazazs i doubt even all file mannagers calculate or display sizes with the same accuracy. Some might trunk, some might round numbers, and going from bits to tens of magabytes calculation might go one way or the other. Plus you have that pesky problem with sector allocation where you can't split everything the way you want. Who knows you might have better luck with 400 or 800gb partitions or even 600 because 7 is a funny nymber. Does not devide by 2.

    Was that 700gb just an ocd- thing?
      My Computer


  9. Posts : 7
    Windows 7 Ultimate x64
    Thread Starter
       #9

    dalchina said:
    You can install Win 10 on the SSD, then shrink the Windows partition and create an additional partition.
    Minitool Partition Wizard for example. (use 3rd party partition managers if making changes to C: ).
    Thank you very much!

    kokodin said:
    Was that 700gb just an ocd- thing?
    The 700GB size is just an optimal choice for OS and data (231/700).
    But the round 700GB yeah, it's OCD.
      My Computer


 

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