Can't read SD card on Mac/Win after mounting DD Android image

[Voyager]

Last night I wrote the Android 5.1 DD image from the Pine 64 site to an 8GB PNY SD card using Win32 Disk Imager. I was then able to boot up Android on my Pine64 board without any issues. However, when I put the card back into my computer, I can no longer read anything on it. I get an error saying the inserted disk is not readable, both on my Windows and Mac machines. 

How am I supposed to troubleshoot or make changes if I can't access the files on the disk? What should I do here?

[MarkHaysHarris777]

Last night I wrote the Android 5.1 DD image from the Pine 64 site to an 8GB PNY SD card using Win32 Disk Imager. I was then able to boot up Android on my Pine64 board without any issues. However, when I put the card back into my computer, I can no longer read anything on it. I get an error saying the inserted disk is not readable, both on my Windows and Mac machines. 

How am I supposed to troubleshoot or make changes if I can't access the files on the disk? What should I do here?

Is it the rooted image?

... there will be somewhere between 10 and 20 partitions on that disk; some, if not all, will not have filesystems for you to mount !

If the system is rooted, you can move the files around, and edit them, and delete them, &c with apps like Better Terminal Pro, and others.

[hrlmbtz]

On mac download sd formatter. Even tho the mac wont "recognize" it the sd reader app will. After that select the sd card in the app and format itn works for me everytime

Sent from my SM-G928T using Tapatalk

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As far as reading it im not to sure.

Sent from my SM-G928T using Tapatalk

[Boring]

Use Linux to mount the sd card. Windows and Mac do not recognise the filesystem used by android.
https://en.m.wikipedia.org/wiki/File_system

Your Android image should work fine.