Class 6 SD card causes problems / lock ups in Droid 2 Global

[Grandpa777]

My Droid 2 Global phone came with an 8GB SD card and I want to increase it to a 16GB card.  I purchased an adata 16GB Class 6 micro SD card.

I copied all my data from my 8GB card to my laptop.  I then copied the data from the laptop to the 16GB card.  Put it in the phone and started the phone. 

The phone had difficulty seeing the SD card and locked up.  Removed battery, reinstalled, restarted.  Similar problem.  Tried various apps and calls - worked (poorly) on some tasks, and locked up on others.

Formatted the card in the camera and then used the USB cable to move data from the laptop - similar symptoms.

Formatted the card in the laptop, placed the card in the phone, and used the USB to copy data to the card - same problems.

Stepped up the process by performing a hard reset on the phone, formatting the SD card, reinstalled apps and tested before adding personal data - still locks up.

I reset the phone again and put my original 8GB card in - once apps were reinstalled and data was pulled onto the card and everything works normally.

I really want to use the larger SD card, but I haven't been able to get it functioning..

I even saw a message somewhere that stated the Droid 2 has problems with Class 6 cards but have found nothing supporting that concept.

Any ideas?

Thanks, Grandpa777

[claribanter]

I've had the same issue with a Wintec Filemate Class 10 16Gb microSD card. I never did figure out how to resolve the problem. I went back to using the original 8Gb card. I've tried a few other 16Gb cards and none work correctly so far. Unfortunately they've all been pretty cheap chinese SD cards and they were all 16 Gb. Please follow up if you do find a solution. According to a speed test, the original 8Gb card can be written to at ~3MB/s and read from at ~5MB/s. I think that is the equivalent of a Class 2 card (maybe class 4?) Perhaps we should try a slower card but I can't get my hands on one at the moment.

[Pyre]

What the heck does NFL have to do with this thread?? lol

[breezex · Accepted solution]

When I replaced the SD in my D2G card with a 16GB one, I researched several cards and class ratings.  Two things seemed to crop up over and over.  Class ratings as an indication of maximum speed are not the same across manufacturers.  Some Class 2 were faster than Class 4 and class 4 faster than Class 6, etc.  Not all, but it was a crap shoot.  Second, Class 10 cards did not work well in all Droids, nor did some Class 6. So I bought the following: 

SanDisk 16 GB microSDHC Flash Memory Card SDSDQ-016G Class 2.

It has worked flawlessly for 8 months.  And seems fast enough for my needs.

My recommendation, for what it's worth: Buy a 16GB SanDisk SD card no higher than Class 4.