topic Re: micro SD-card is deactivated when USB-device is connected via OTG ?! in Tablets

Apps moved to micro SD-card not available when USB-device is connected via OTG ?!

Arch5tanton — Tue, 10 Nov 2015 12:57:44 GMT

Hi everyone,

I have read that the micro SD-card will get deactivated once a USB-stick
or -HD is connected via OTG.
Is this true? Can this be behaviour be changed?
Would this be different if I installed AOSP on the Z4?

Thanks a lot for your help! Using SD-card and external USB
simultaneously is vital for me as I need to copy photos from an external
stick / SD-card to the tablet's SD-card for backup-reasons.
Thanks again and best regards

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Rickard — Tue, 10 Nov 2015 16:43:13 GMT

I just tested it here in a Z4 Tablet and you have access to internal storage, the SD card and the external USB-drive at the same time.

I can't remember hearing of what you describe on any of our products actually.

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Arch5tanton — Wed, 11 Nov 2015 08:59:01 GMT

Hi Rickard,

thanks for your reply. I must apologize, my description was not very specific.

If you could have a look especially here:

http://forum.xda-developers.com/z4-tablet/help/usb-support-t3151411

and here:

http://forum.xda-developers.com/z4-tablet/general/usb-otg-support-t3147871?

Users describe that, in case apps have been moved to the SD-card, once a USB-device is connected via OTG those apps became inaccessible. In some cases (apps try to run in the background) a crash of the Z4 is reported.

Someone is even quoting a reply from Sony support according to which the SD-card is meant to unmount on OTG-connect.

Could you possibly test / confirm / deny this?

Thanks a lot for any hint and best regards

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Rickard — Fri, 13 Nov 2015 08:06:01 GMT

I see. That is something i have heard of (it's been reported here on our forum as well) and it has been forwarded internally.

But as i understand it, it's not when you connect the USB-drive it may happen. It's when you then disconnect the USB-drive.

If this happens for you i can at the moment only recommend that you don't move apps to the SD card. Z4 Tablet has about 20GB of available internal storage so i think in most cases it's not needed. Also note that moving an app to the SD card only moves the apk-file and not other data like obb.

In case this has happened, try restarting the tablet.

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Arch5tanton — Fri, 13 Nov 2015 08:40:52 GMT

Hi Rickard,

thanks for your reply.

Any idea whether this behaviour might be different when installing AOSP and/or using the Link2SD-app (so apps are not moved to SD but rather linked to a 2nd partition on the SD with ext4-formatting) ?

Thanks again!

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Rickard — Fri, 13 Nov 2015 09:43:21 GMT

I'm afraid i don't know how this works in AOSP or with Link2SD. They require unlocked bootloader/root access.

But it has been forwarded internally and i will let you know as soon as i hear anything.

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Arch5tanton — Fri, 13 Nov 2015 10:06:19 GMT

Hi Rickard,

thank you for offering further information and for your great and fast support on this!

Best regards.

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

Amonkeykong81 — Tue, 05 Jan 2016 21:38:37 GMT

Hi I'ma owner of a z4 tablet and i got these problem - i've try different microsd cards kingston and sandisk and I got the problerm if an OTG cable ( tryed different cables) is mounted, - the apps on sd card are not available and even if I disconnect. It needs a restart to brng them back on screen.

Further I reset my Tablet to factory two times but the problem remains.

Re: micro SD-card is deactivated when USB-device is connected via OTG ?!

VG4 — Sun, 16 Jul 2017 21:38:28 GMT

Has this problem been fixed? I want to use the z4 tablet to process pics from my DSLR without hauling a laptop between continents, so a USB card reader would be the thing.