1. missionsparta's Avatar
    I have had two 1520's and two 128gb Sandisk MicroSD Cards. With any combination, once I fill the card to about 35-40gb, the whole phone slows down. Apps (both on the card and the phone) are slow to open. When opening folders, the icons take a few seconds to appear. When rebooting, it takes a while for the phone to find the apps. A hard reset fixes this until you start to add apps or video files again. This started with Windows 8 and still is and issue with Windows 10 Mobile. I am looking to maybe try a Samsung 128gb card and see if this helps. Has anyone had rwal good luck with a larger card and a 1520 running great when they fill it?
    04-05-2016 07:34 AM
  2. TechFreak1's Avatar
    What class are your micro sd cards and tier i.e pro, extreme etc?
    04-05-2016 09:38 AM
  3. missionsparta's Avatar
    Sandisk Ultra 128GB Class 10 MicroSD XC1
    TechFreak1 likes this.
    04-05-2016 11:05 AM
  4. TechFreak1's Avatar
    Sandisk Ultra 128GB Class 10 MicroSD XC1
    Interesting, as I don't have a 1520, nor can use one with my 920 I'll leave this one for other 1520 users to chime in.

    As the only thing I can thing off is that the cards may be on the verge of giving out but that's just a wild guess as the behaviour is similar to my dad's 620 as apps were slow to open, then pictures started disappearing, phone became somewhat sluggish - removed it - everything was fine. Had to reinstall the apps though and set everything back to built-in storage in storage sense.
    04-05-2016 11:22 AM
  5. pankaj981's Avatar
    I've had SanDisk cards and overall they've been slow on my 1520. Right now I'm using a Samsung and it's definitely fast, especially during 4K video recording.
    TechFreak1 likes this.
    04-05-2016 11:27 AM
  6. missionsparta's Avatar
    I've had SanDisk cards and overall they've been slow on my 1520. Right now I'm using a Samsung and it's definitely fast, especially during 4K video recording.
    Mind if I ask what Samsung card you are using or a link? Thanks for the help, guys.
    04-05-2016 12:16 PM
  7. pankaj981's Avatar
    Mind if I ask what Samsung card you are using or a link? Thanks for the help, guys.
    I have this one but the read speeds are definitely in the 50s, not sure why the product label says 48mbps.
    04-05-2016 01:25 PM
  8. missionsparta's Avatar
    I have this one but the read speeds are definitely in the 50s, not sure why the product label says 48mbps.
    Thanks. Maybe I will buy the 128GB and see what happens. Amazon is good about returns anyhow if there is an issue.
    04-05-2016 01:40 PM
  9. pankaj981's Avatar
    Thanks. Maybe I will buy the 128GB and see what happens. Amazon is good about returns anyhow if there is an issue.
    Make sure you test the card with a benchmark program like crystal disk
    04-05-2016 04:33 PM

Similar Threads

  1. Being a Lumia 1520 user, should I buy Lumia 950?
    By m_umair_85 in forum Phone Wars
    Replies: 6
    Last Post: 05-08-2016, 12:23 PM
  2. Lumia 1520.3 and two cases for $250 OBO
    By suburbanl3g3nd in forum Marketplace Archive
    Replies: 5
    Last Post: 04-13-2016, 06:38 PM
  3. Nokia 635: Is there an app to put maps on an SD-card?
    By Windows Central Question in forum Nokia Lumia 635
    Replies: 1
    Last Post: 04-05-2016, 06:25 PM
  4. Replies: 2
    Last Post: 04-04-2016, 10:08 AM
  5. Navigation keys- Lumia 1520 running 8.1
    By Marie Beesler in forum Ask a Question
    Replies: 1
    Last Post: 04-03-2016, 09:44 PM
LINK TO POST COPIED TO CLIPBOARD