Expandable Storage via microSD

Microsoft supports expandable storage on Windows Phone 7 devices. If an OEM chooses to do so, it can implement a microSD card slot for additional storage. This is similar to what Google allows with Android, however the similarity ends here.

Windows Phone creates a JBOD span across your internal NAND and any NAND on microSD. It’s all treated as one contiguous address space, like a large hard drive or SSD. The benefit is you don’t have to manage where you put your apps, music, movies or photos. The downside is you can’t just remove/replace the microSD card in your phone.

The OS is obviously stored in a known location, however data is written linearly across both internal and microSD NAND. Your phone will still boot if you remove or swap out the microSD card, but you’ll be greeted with an error.

If you remove the card and attempt to read off of it on your Mac/PC you’ll quickly realize that you can’t. By removing the card you effectively break the file system. Microsoft provides you with a couple of other options to get data to/from the phone (which I’ll get to later) so you don’t have to rely on swapping microSDs.

You aren’t stuck with that original microSD card however. If you do a factory restore with a new microSD card installed the OS will format across it and you’ll be good to go. Obviously you’ll have to re-download all of your apps and sync all of your files but it does work.

WP7 vs. iOS4: Multitasking, Copy & Paste, Suspend Syncing over USB and WiFi
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  • Lapoki - Thursday, October 21, 2010 - link

    I think WP7 has potential and could very well be my next purchase. Great article guys, it was long but very detailed.. got me through a boring afternoon.
    One thing seems missing though... the infamous signal strength comparison that you have been doing for all other phones ever since iPhone 4.
  • wht1986 - Thursday, October 21, 2010 - link

    One of the most informative WP7 reviews I have read. I actually didn't skip to the end just to read the conclusions. I read it all and enjoyed every page. Well done.
  • epyon96 - Thursday, October 21, 2010 - link

    Did I read that right?

    Only Mp4 and WMVsupport?
  • strikeback03 - Friday, October 22, 2010 - link

    I'm guessing that is the audio codecs allowed for videos
  • Tanclearas - Thursday, October 21, 2010 - link

    "When Apple introduced the iPhone, Steve Jobs made the point that a virtual keyboard was preferable to a fixed keyboard because you shouldn’t always be stuck with the same keyboard layout. Some applications would require a slightly different layout and other applications wouldn’t need it entirely. A physical keyboard requires you to pay the space penalty regardless of what you’re doing with the phone."

    Really? So, by that argument, Google/Android is the better choice of phone. You shouldn't always be stuck with a single choice of phone layout. I use my hardware keyboard regularly on my G1. As for "applications requiring a slightly different layout", that's a load of crap. When typing, I always want letters and numbers, and I want QWERTY with number keys above. I don't want an on-screen QWERTY with a separate button to press to switch back-and-forth between letters and numbers.

    The "applications that require a slightly different layout", perhaps like the phone keypad, can still use an on-screen keypad when necessary.
  • DP-16D - Thursday, October 21, 2010 - link

    Windows 7 Phone must be absolutely phenomenal given the writers' incredible Mac-centric slant (especially with the Windows 7 desktop non-sequitor at the end of the review). Furthermore: The e-mail and messaging pages don't include comparisons to Blackberry, the de-facto standard for communication on smartphones. In fact, I cannot recall that line of phones being mentioned at all. As an existing Blackberry user considering a switch to Windows 7 Phone your review is nearly worthless, because 99% of my phone experience is about functionality and not whether or not my handset can sing and dance better or worse than iOS and Android.

    Normally I enjoy reading Anand for very thorough reviews, but this review's omission of the essential and inclusion of the irrelevant will make me reconsider reading any future submissions by these two writers.
  • beefnot - Thursday, October 21, 2010 - link

    C'mon man, although Blackberry is a mkt share leader, it is a 20th century platform with very little innovation. It is walking dead with respect to consumer devices, which is the segment that Windows Phone 7 is currently targeting. I own a blackberry for work, but there is no way in hell I would consider it for my personal mobile device, and I don't give a rat's ass that it is excluded from comparison.
  • Reven - Thursday, October 21, 2010 - link

    I'm happy with my iphone 4 for now, but I will seriously consider getting the next generation of Windows Mobile phones when I eventually upgrade.
  • anona6 - Thursday, October 21, 2010 - link

    Hey I live in Tucson, and I was wondering if anandtech was based out of Tucson or something.
    This article made it a little more exciting for me just because it was local to me, and you have
    one of my favorite coffee shops there that's nearby my University.
  • Zstream - Thursday, October 21, 2010 - link

    Do you know what the talk time is for the LG? It's not showing on the graph

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