wait and hope
Ok, I wrote yesterday a mail to the developer from "photo editor" and wait now for an answer.
Thank you.
The method has changed. Apps can be updated to be able to work with the external card through the Document Provider. EZ-PDF Reader is an example of one that has been updated. In this app, there is an option "open from document provider". When used, it can get a document from the external card and save it back. The first time you see the Document Provider page, you need to go into the settings page and click on 'Display Advanced Devices'. After that, any updated app will be able to access files with write access on the card.
Quick Office from Google also can do this.
Best thing to do is write to creators to get them to move to the new method, or look for comparable apps that have been updated.
For a file manager, ES File Explorer seems to work in kitkat.
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Ok, I wrote yesterday a mail to the developer from "photo editor" and wait now for an answer.
Thank you.