about resize system and data for huawei phone

hey

from month i got huawei device model g6-u10

i have sd card 8g

and its ok for now but problem with system and data partitions the have low size

my system size 0.96gb of 0.98gb
and my data size 146mb of 0.98gb
and i have 2 partitions from sd card
sd card size 3.71gb of 5.37gb
ext3 partition size 77.09mb of 2.06gb

what i can do to increase size of both partitions

any idea guys? or how we edit partitions size and get space from sd card

i hope same one have solution for this problem

i need install same mods or just install big system like 5

my last version of android 4.4.2 so what if i need more space for install what i like

waiting smart one can make it happen :(

[Q] How do I resize the partition that stores my data?

I own the 64gb version of the Oneplus One but after flashing cm-12.1-YOG4PAS1N0 only ~12gb are available. Flashing a different rom and reflashing cm-12.1-YOG4PAS1N0 didn't help.
Also, someone told me to use this make_ext4fs /dev/block/mmcblk0p15 command in the twrp command prompt. Does that have something to do with it?

Thanks for your help!