Identifying partition creation dates and deleting one
Solution 1:
Open Disks -> Select Your Disk -> Look For 'primary' keyword. This will tell you what is your primary partition.
Most of the times its /dev/sda2. You can resize your partition after unmount whole disk. To increase partition size you need free space in your disk.
To know the create date of specific partition, run this code:-
sudo dumpe2fs /dev/sda2 | grep create
here /dev/sda2 is name of your partition device.
To un-mount you can use sudo unmount -v '/' where / is your target location.