In SSD history that begins to be already on the old side - but still if it's a normal 128Gb or bigger drive from a 'regular' manufacturer like Corsair, OCZ, Samsung, Intel, Kingston etc. you should be just fine with it. If you have had it basically full for a long time those memory blocks have not 'worn' at all. So if you clean the drive from cruft you have gigabytes of completely fresh cells at your disposal along with the overprovisioning gigabytes which are always stored to replace possible single broken cells.
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Thanks for the info. Mine is an Intel.
