The system partition is 1,000 MB, so that is more than enough.
The problem is the data partition. It's only 1,78GB in size. Less than 2GB. With a couple of add-ons and the thumbnail cache for a decent movie and tv collection, something like 4GB and higher is recommended.
I have no idea what /dev/sd5 contains but that ext4 partition seems big. You could resize that some 4GB smaller, move up both OE partitions, and then increase the size of the /dev/sd7 data partition with that 4GB to the disk's end.
And also rename the labels of sd6 and sd7 while you're at it.