hard

Review the processor registers and assembler instructions at the fault to get a better idea of what the cause might be.

Generally will be issues accessing memory, either memory that doesn't exist or alignment issues. Check things like stack size, potential corruption on stack. Make sure not to link 32-bit code into the project.

Do you have a teacher, colleague or supervisor who can work with you on these things?

:(

Thank you for your help in advance

How to 

stack size, potential corruption on stack pleaase ?? 

and how to 

Make sure not to link 32-bit code into the project. ??

If the project is empty and generated by the CubeMX - please check the clocking. Try HSI as it is build-in clock and check again.

I tried HSI  instead of HSE  in systemClock_config and it is same '' Hard fault handler ( FORCED) '

:(

Yes I am using this board T32479I EVAL..

Idid not understand your question 

25 MHz?

Running at 128.57 MHz? 

it is 

FLASH_LATENCY3 shall I increment it to four for example ? 

I would honestly suggest to look for a local mentor, who can sit at the screen with you.

Seems you are a bit overtasked.