On my PC, which has only the one HDD, I have four partitions, one for the Windows OS and general stuff, one for all my important documents, and two more which are mirrors of those documents. Security is not really an issue if someone else got hold of the documents, BTW. The thing is, I recently had a bad experience with trying to use CD-Rs and DVD+Rs to backup this data, which is about ~12Gb in size, and in any case I hated trying to split the data across multiple discs in such a way that I didn't need to replace the discs so often as the contents became newer. So I've chosen not to use optical media at all now. I backup the data on the HDD with Robocopy's mirror function with an option to exclude older files, and I have used two USB flash drives and two SDHC cards (all Sandisk) as well as a MicroSD card for the MP3 player together with Robocopy to mirror all the contents off the main documents drive on the HDD, and if it ever came to it, each other. The thing is, if Robocopy only copies those files which are new, are redundant or have changed, does this mean it is friendly to Flash memory as it is not performing unnecessary write cycles? I would imagine so. I would hate to think that the memory had degraded without my knowledge. How reliable is Flash memory? I keep hearing people say that Flash memory devices should only be used for transport, but there's no viable alternative. Ideally, I would like several memory devices stored around my bedsit and not all in one place (like a SSD or HDD would limit it to) - what conditions should I store such devices in? I have ordered plastic cases for the SD cards and intend to stick them inside the former CD wallets (which are mostly empty now). Any advice would be appreciated, except for getting an HDD for storage, which I do not want, as the data is small enough and I want it in several locations. Thanks in advance.