• Micro Sd 16gb Cards

I have searched a lot today and not finding a real answer to what I suspect is a Windows OS issue. I will breakdown everything I have tried, although the wording may not be exact just going from memory.

May 9, 2017 - These are the numbers you see on cards like U1 and U3, sort of like the old Class. SanDisk Extreme PLUS 32GB microSDXC UHS-I/U3 Card.

My wife was going to transfer some pictures off her phone (Droid Turbo 2, Android) which are stored on a micro SD card. We removed the card and put into a microSD to SD converter card, and into the card reader on her Win 10 laptop.

The SD card is not detected, and shows no drive letter under This PC.

Going into Computer Management, under Disk Management, it shows a Removable 7.40 GB Healthy drive. I can not assign a drive letter.

So I tried my computer, which is also Win 10 (Pro, which just updated to Ver 1607), using a USB card reader (which has a microSD slot, so no longer using the converter card.) Same symptoms. I know my card reader works with other microSD cards of identical brand and capacity, I tried again with another just to be sure.

I began to suspect an issue with Windows so plugged the same USB card reader into Raspberry Pi (Raspbian OS) and it can read & display all the pictures on her card.

I gave up for the moment on her card, and went to read a different microSD out of one of my old Android phones. Same thing...will not show a drive letter in 'This PC' on my computer. So then I shutdown Windows and boot Ubuntu from a USB drive. That reads this 2nd card fine, same computer, same USB card reader, same everything just different OS. I checked on disk information and it is formatted as FAT32, so that shouldn't be an issue. I don't remember what allocation size value.

Last test: Same USB card reader and microSD, tried on old Win7 Pro laptop, reads fine.

After some searching of similar problems:

Card reader driver issue? My card reader shows in device manager as 'Mass Storage Device USB Device', and has no markings of brand so its just generic. So I wasn't able to find a better driver than the one provided by Microsoft. But remember the reader does work with other cards...

I will probably end up using another OS to copy from microSD to USB flash drive and then over to PC, but just wanted to see if anyone else has felt this pain and found a solution o(r if nothing else to get the programmers moving on an update to resolve this.)

Micro Sd 16gb Cards

I could copy all data off the microSD and reformat, then paste the data back on and see if it works, but haven't gone through that work yet.

I don't know what other steps to give to replicate a problem... I took a third microSD, which works in my Win10 setup, removed the partition so it was blank, then inserted in old Android. It said it was not formatted and I told it to do so, then I snapped a few random pictures and then unmounted the card, and it works in my Win10. So I don't know.

Thanks,
Nate