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Ideal size for c drive and it's usage

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Last Modified: 2020-11-15
Hi
In a laptop with 512 GB SSD
What's the reccomended size of C drive.

As per my understanding if I divide the SSD into two C drive and D drive.
Then if something happens to windows
I can reinstall or repair it and my D drive will remain intact ?

But files in C drive will be deleted ?

So if that is true what I understand is

1) Don't save any personal data in c drive
2) don't install any softwares in c drive too. Because in case of reinstalling the softwares will be needed to reinstalled

Thanks
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System Administrator
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Farbood NajafiSystem Administrator
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200GB. Think of growing up Winsxs.
Hello ThereSystem Administrator
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If you need 200GB to have enough disk space for the WinSXS folder, something must be wrong with your computers. It's true that this folder grows over time but this seems too much.
KimputerIT Manager
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strivoliIT Manager
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I fully agree with nobus.
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Hello ThereSystem Administrator
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I probably live in a different world. Never has issues as you have. I've managed hundreds of Windows devices and I've never been even close to 100GB due to WinSXS. 120-150GB was always enough (and usually more than enough) for the system and programs.
Seth SimmonsLead Systems Administrator
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ridiculous...a windows 10 base install (with page file) is less than 40gb

sure. even more like 20-30. then after a few years of updates, tmp files clobbering stuff all over the place, storing stuff in the all users profile that you do not often move, registry fragmentation and useless entries ...

i am very happy if microsoft finally did solve the issues with updates taking unlimited disk space. nevertheless i absolutely do not trust them. note that the recommended size changes. and i'd also account for one upgrade to something yet unknown.

btw, "with page file" does not mean much.  the page can be pretty much any size though i am unsure windows 10 allows less than your ram.
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good point on the SSD drives !
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totally agree with the uselesness of page files these days. i have not been using one since 2006 or even before on any machine i ever had control on. my first swapless machine was in early 2000s...

also agreed tmp files can be removed, and system cleaned up. then as a non windows user, i fail to see the point of littering and cleaning. and would rather either assume the users have better things to do than periodic cleanup and give them enough space or educate them to use another os.
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People take their cars in for oil changes.
People take their cars in for tire rotations
People take their cars in for 30,000, 60,000, 90,000 mile checkups to keep their cars running.

Computers need patching.
Computers need disk space cleanup.
Computers need OS refresh once in a while.

Windows is not the only system that needs cleaning.  There's /var/tmp/ which doesn't get deleted upon boot.  There's those cache folders in people's users profiles.  There is no OS that doesn't need periodic maintenance.

You have to maintain a computer.  Just because some people don't take care of maintenance, doesn't mean you should skip it.  Ron Popeil's "set it and forget it" motto is fantasy, and does not apply to computers at all.
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You can come close to set it and forget it by buying enough RAM and just having a large enough single partition so you don't run out of disk space.  SSDs just need to be backed up.  Their failure modes are more likely to be full denial of access rather than bad blocks.  Get an external backup disk or purchase a cloud backup service with encrypted data stores and zero knowledge access.
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based on personal experience, most oses i run at home actually outlived the computers, and i don t remember cleaning up anything except for my own mess. not having temp files clobbering your drives because whatever you use does not leave tmp file all over the place, constant log file sizes, rock solid drives and raid and some decent backup policies are indeed a thing.

windows has quite a different history which is why i suggest consevative settings