1. PratikMade's Avatar
    Can someone plz tell me if upgrading your SD Card from CLASS 4 to CLASS 10 ULTRA would increase my performance in app startups or decrease the "resuming" screen that always pops up nowadays since updated to WPDP 8.1 UPDATE1 as my SD Card is storage is starting to fill up, where only 10MB OF SPACE IS REMAINING.
    09-08-2014 08:25 AM
  2. N_LaRUE's Avatar
    Of course upgrading to a class 10 will increase performance. Will it increase it to the level you expect I don't know but I get resuming on my L920 with no SD card so take it from there.

    You obviously need a larger card regardless as you only have 10MB OF SPACE REMAINING.
    vsmh96 and PratikMade like this.
    09-08-2014 08:39 AM
  3. PiggyMiddle's Avatar
    There's a lot more to it than just the "Class." Flash memory devices have a finite write count. Meaning each Byte wears out after about 1000 or so writes. Reads do not really count. The Flash memory devices have an inbuilt operating system, usually cut-down Linux (SoC) that handles what is called "wear leveling." This does not instantly reuse previously freed up memory Bytes, it uses ones that have not been used at all or were freed a long time back. In fact Flash devices have more memory than they show as it is a buffer to be used to help extend the useful life fo the Flashdevice. For instance a 32GB SD card might actually have 40GB allowing the spare 8GB to be used in the wear-leveling over it's life.

    As the Flash devices gets older, it takes longer to jump all over the place to write new stuff back. So, it is a good idea to replace Flash devices periodically if they are getting slower than they used to be.

    OK, back to "Class." The Class does define Read/Write speeds but the increments between Classes were not all that great. The newer approach is "UC" ratings and the increase in speed is significant. So, get yourself as big (in GB) a card as you can afford with the highest UC rating, they will almost certainly all be Class-10. Not all devices (phone, tablet etc) handle the latest and greatest Flash memory protocols, so be aware that an expensive 128G, Class-10, UC-2 card costing a hundred bucks may not do any more than a 16GB Class-4 in your device. Just saying, ya know.

    Having said that I have several 64GB Sandisk Extreme micro-SD ($60) for my Miix Tablet that are amazingly fast.

    Caveat: Nope, I have nothing to do with Sandisk, I just like their stuff.
    PratikMade likes this.
    09-08-2014 11:37 AM

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