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I'm purchasing an ultrabook with an SSD (I've used only HDDs hitherto), and am slightly worried by the drive's read-write longevity. Should I store frequently read/written directories (e.g. downloads, cookies, documents) on a flash drive (easily replaceable after protracted use) to minimize wear and tear on the SSD itself? Would there ultimately be a noticeable positive effect, or should I not bother? If yes, then what should I store on the flash-drive (caches, etc.)?