My phone won't turn on!

Okay, so yesterday my phone was charging and was charged 70 percents when I turned it off. Today, when I woke up, I tried to turn it on, but it was stuck at huawei letter screen and after few seconds it turned off. Then, I put it on charger and turned on, when appeared eRecovery screen and there are options:

Download lastest version and recovery

Factory reset

Reboot and

Shutdown.

First, I clicked on Download lastest version and recovery and it connected to WiFi, when suddenly, on screen appeared:

No enough space in inner sd card. Then, there are two options:

1. Clear inner sd card
2. cancel

I clicked on cancel because I don't know will that clearing will delete my files on that phone?

I also tried rebooting/restarting but it won't turn on.

Please help me I don't know if I can fix it by myself or I should visit phone service?