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Thread: Backup through Tablet

  1. #41
    Ausphotography Regular
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    Well, some more to report, I think we have a kind of success!

    I formatted the SD card in the PC, then placed it in the camera, and without formatting in camera, took some shots.
    It seemed to work OK, without in-camera format

    Now I have the following method, using the two apps, X-plore and MyFiles

    For CF card, format in camera, and access with the tablet using the X-plore app. MyFiles cant see it. Save files to internal SD card.

    For SD card, format in PC, and then access with the tablet using the MyFiles app. X-plore cannot see it. Save files to internal SD card.

    To transfer from the internal SD card to the USB stick second backup, use Myfiles, X-plore cannot see it.

    As long as I can remember all that, I should be OK.

    I'm waiting for the arrival of a powered OTG cable, to see if I can access the 250Gb SSD drive.
    David

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  2. #42
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    The powered OTG cable arrived today, so I tried it out in great excitement!

    As soon as I connected it all up and switched on the USB charger that the device was plugged into, the light on the SSD drive came on, green, and I was hopeful.
    Unfortunately the tablet was unable to see the drive at all, with either app. I tried plugging a USB stick in, and the tablet could see that, so the cable is OK.

    Looks like the original plan (128Gb USB stick) will be the one!

  3. #43
    A royal pain in the bum! arthurking83's Avatar
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    My newly purchased USB stick CF card reader arrived today too.
    Read some folks had success with these types of card readers .. but not this one.
    TabII says high powered USB device connected, won't allow access.
    So these CF card readers will also be hit and miss on older gen devices ... ie. non USB3/USB-C type connected devices.
    Works perfectly on the phone and newer Lenovo tablet .. so all good on that front(ie. going forward)


    Quote Originally Posted by davidd View Post
    The powered OTG cable arrived today, so I tried it out in great excitement!

    As soon as I connected it all up and switched on the USB charger that the device was plugged into, the light on the SSD drive came on, green, and I was hopeful.
    Unfortunately the tablet was unable to see the drive at all, with either app. I tried plugging a USB stick in, and the tablet could see that, so the cable is OK.

    Looks like the original plan (128Gb USB stick) will be the one!
    I'm thinking, if the 256G SSD was used for PC duties .. maybe it's formatted in NTFS??
    Try using either exFat, or Fat32 formatting and try again on Android.

    Can't remember, but I think Android doesn't recognise NTFS(natively .. but may with additional drivers/apps)
    Android historically used ext3/ext4, and Fat32, but I think also recognises exFat on some of the later versions.
    Fat32 up to 32G works fine, but can be flaky(not guaranteed) on any OS... could be device dependent.
    So, for more positivity/surety, I'd say if you reformat a large(ie larger than 32G device) exFat would be the way to go .. ie. Android and PC(Windows) shouldn't get confused.
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  4. #44
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    Hi Arthur, it was a good thought, but when I checked the formatting, it is formatted as exFAT. I re-formatted it and tried again, but the tablet does not even acknowledge that something has been plugged in, it cannot see the drive at all.
    The 128Gb USB stick that I have is formatted exFAT, and the tablet sees it with no problems, so the formatting is not the problem.

  5. #45
    A royal pain in the bum! arthurking83's Avatar
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    Quote Originally Posted by davidd View Post
    Hi Arthur, it was a good thought, but when I checked the formatting, it is formatted as exFAT. I re-formatted it and tried again, but the tablet does not even acknowledge that something has been plugged in, it cannot see the drive at all.
    The 128Gb USB stick that I have is formatted exFAT, and the tablet sees it with no problems, so the formatting is not the problem.


    Not sure what's going on then.

    Another thing too.
    I have a USB powermeter device, and never thought to use it to check power usage(s).

    Quick test on my new thumbstick CF reader shows that it barely draws 100mA(which makes it a medium power USB device) .. not high power as Android says when I connect it.
    In read mode, I reckon I've seen max 70mA, and in write mode it varies between about 70mA and about 110mA, sometimes a quick spike to about 140mA.
    So averaging out in write mode at about 100mA or so.
    At idle it only sits at 10mA(min resolution, so probably less than that.

    Hence .. have no idea why early Android with microUSB can't detect the device properly!
    100mA is not a lot of power draw.

    While the flexibility of Android is great for the kinds of uses we're describing here .. and at least you've found one resolution to your need .. it's still annoying that it's so hit and miss.

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