I came across this issue once.
To resolve it I made sure I started with a clean SD card that I fully formatted as FAT32 (no quick format). Then I confirmed that it had 8gb of storage space after formatting it. Lastly, after installing the image on the SD card with Win32DiskImager and booting up my Pi, I expand my file system in raspi-config.
The easiest way to clean a disk and get rid of partitions before formatting with Windows is by using diskpart:
1) In Windows click Start then Run.
2) Type diskpart then hit enter.
3) After it opens, type “List Disk” then hit enter. This will list your disks with their disk numbers on the left.
4) If your 8gb SD card is disk 1, type “select disk 1” then hit enter (use whatever disk # your sd card comes up as). Do not select the wrong disk.
5) Type “clean” then hit enter. This will clean your disk.
6) Type “create partition primary” then hit enter.
7) Lastly, type “exit” then hit enter to close diskpart.
After cleaning your disk, format it as FAT32. Do a full format, not a quick format.
Image your SD card using the latest image (2.6) with Win32DiskImager.
Put the SD card in your Pi and boot it up. After your pi boots into EmulationStation, you can hit F4 if you have a keyboard connected to it, to exit to a command line. From there type “sudo raspi-config” then hit enter. Select the option to expand your file system then expand it.
This worked for me. Good luck.
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