How to rename my external SD card?

When I moved my 128gb card from my Note3 instead of extSdCard it for some weird reason named it 18fa-adfa. It's there a way to rename it. I have Busy box installed, I just need to know the steps to do it. I tried using ES Explorer but got a task failure.

Worst case please tell me how to do a symbolic link.

Thanks.

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