Unsolved Encryption of a MicroSD card neccessary?
I've successfully encrypted phablet on my phone, but I was also wanting to encrypt my microSD card. I started the same process I underwent (here) in my card's directory but ran into a problem: I can't create an img file large enough to fill even most of the card. Fallocate says that the file is "too big", despite not being too big for the file system or hardware. This is a different result than if it simply didn't have enough room, as it would normally continue until all storage was filled.
But this made we ask whether I really even need to do a secondary encryption. Since the device is mounted inside of phablet, doesn't that mean that everything I write to it is encrypted?
Since the device is mounted inside of phablet, doesn't that mean that everything I write to it is encrypted?
To start with your last question. No. Even if you would mount your SD card under the phablet home directory, it would still be unencrypted.
What filesystem did you format your SD card with? There is a files size limit to the FAT32 filesystem.
But since you intend to mount an image file with an encrypted filesystem anyhow, you might want to format your SD card as ext4.