Android Question file write to UMS but file size zero???

dongsool

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I'm trying to save an Excel file to a USB Mass storage

But if I check the file, it's a randomly, size of zero.

And I can't open that file.

The file size seems to be zero when removing UMS.

Do I need to unmount and remove UMS? on Android
 
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DonManfred

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To access External Storages like USB Mass Storage you need to use the ExternalStorage Class.

ExternalStorage - Access SD cards and USB sticks

Before we start: External storage means a real sd card or a connected mass storage USB device. This class can also be used to access the secondary storage (File.DirRootExternal). This becomes relevant with newer versions of Android that restrict direct access. It has nothing to do with runtime...
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