06-20-2017, 03:17 AM
For flash based media in general more free blocks gives the sdcard/emmc/ssd controller more room to work with for optimization and block wear management. That being said the controller is a black box for each device and we dont really know what it's algorithms are. Personally I leave a 8GB swap partition on my 64GB cards that more or less never gets used but makes sure there are blocks that are never really written to available...
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