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What is the recommended free space for HDD?

Muz1234

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What is the recommended free space in hard disk drive especially the system drive (C Drive)? 10% free?
 

mdchachi

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What is the recommended free space in hard disk drive especially the system drive (C Drive)? 10% free?
10% is the recommended minimum to avoid fragmentation. More is better.
 

Muz1234

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If it is less than 10%, the OS automatically runs fragmentation?
 

bentenmusume

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That depends on your OS and system settings.

Why do you ask these questions on a Japanese culture/language forum instead of a technical support forum?
 
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If it is less than 10%, the OS automatically runs fragmentation?
Historically, windows requires 15% to defragment a (magnetic spinning) hard drive. (As bentenmusume-san says, whether that is automatic depends on settings).

Solid state drives (SSDs) with modern versions of Windows essentially manage fragmentation automatically, but you should leave 25% free space for best performance.
But, very modern SSD usually have hidden capacity specifically to leave room for defragmenation needs and as replacements for failing sectors, so... how much space you actually need to leave depends on how much hidden capacity there is.

 

Mansoor

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As dear madchachi recommended, fragmentation can be an alternative, though it mostly arranges the programs in HDD partitions for a better function and speeding up the programs execution, nonetheless it collects and arranges the outspread empty spaces of every partition in one place that can increase the HDD operational empty space.

The second alternative is cleaning up HDD from unnecessary or junk files and programs. Windows itself has such the facility but it is not a developed and comprehensive one. There are some cleaning up software that can help users to remove unnecessary occupant files and also wash registry from unnecessary keys and thus polish it ! But you should be careful about such the software and choose the most reliable one, because some of them can remove a program or file that you don't want to be deleted, and some of them even do this automatically every week or month!
 
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