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  1. #1
    Star Lounger
    Join Date
    Mar 2012
    Thanked 3 Times in 2 Posts

    Free space on a SSD

    Have noticed that my boot drive (128 GB SSD) is getting a little full. My system is a desktop with a non-touchscreen monitor. This boot drive holds Windows 8 & apps; data & backups are on other physical drives. I have run CCleaner with minimal results. Currently, I have 26.7 GB free out of 111 GB available (128 GB post-formatting). I have - not yet - noticed any slowdown.

    How much free space should I have to allow the drive to perform properly?
    If more free space is recommended aside from a larger SSD (or including fewer apps) what can/should I remove to regain space?

  2. #2
    Super Moderator satrow's Avatar
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    Dec 2009
    Cardiff, UK
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    Hi Duncan, I assume this is a single drive system, yes?

    The amount of free space is related to wear-levelling, ensuring that all the memory cells are 'worn' evenly, thus giving the drive a longer error-free lifespan. If you have done the usual good SSD 'tweaks' to minimise the background writes to the drive then keeping above the 20-25% free mark should be fine, dropping below that for a short time (not long-term) should be ok. Don't benchmark too frequently, as it's a good way of adding a GB or more of wear in a very short time.

    Smaller apps are better than their 'full-fat' brethren but watch out for downloads that are xxMB, only to find that they're only a stub installer and it needs xxxMB more downloaded to complete. Check drive space needed before deciding which alt. software to use.

    The read/write speeds may need to drop by ~50% before many users would notice any speed drop anyway. A pretty good discussion on the 'best' SSD tweaks is here, there are many others, some are older and less well thought through.

  3. #3
    Super Moderator CLiNT's Avatar
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    Dec 2009
    California & Arizona
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    You'll need to find out where the space has gone as a first step.
    You can get a better idea of this by downloading and running one of the many hard drive space monitoring apps.

    The one I'm currently using is Space Sniffer by Uderzo, It's free.
    Last edited by CLiNT; 2013-06-28 at 08:57.
    Invest a little time and energy in a well thought out BACKUP regimen and you will have minimal down time, and headache.

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