[SOLVED] Create copy of Raspberry PI SD-Card

sudo fdisk -l

Take note of how the SD card is identified.

In my case it is /dev/sdb1.

Then:

sudo dd bs=4M if=/dev/sdb | gzip > /home/your_username/image`date +%d%m%y`.gz

This will compress the image using gzip.

To restore the backup on SD card:

sudo gzip -dc /home/your_username/image.gz | sudo dd bs=4M of=/dev/sdb

Source: https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=46911

[SOLVED]Attach a file from SD Card to email

Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.setType("plain/text");
emailIntent.putExtra(Intent.EXTRA_EMAIL, new String[] { "user@host.com" });
sendIntent.putExtra(Intent.EXTRA_SUBJECT, "Photo");
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/dcim/Camera/filename.jpg"));
sendIntent.putExtra(Intent.EXTRA_TEXT, "Enjoy the photo");
startActivity(Intent.createChooser(sendIntent, "Email:"));

Trying to attach a file from SD Card to email - Stack Overflow.