Usb Kali (Not Live) Problem/Troubleshoot

[IlllIll]

Hi, new to these fora and kind of noob about Linux.

I know i can make a "usb live kali persistent" or a run a Virtual Machine of Kali on Windows, but i am trying to install Kali OS on a usb stick (16 gb). I am imagining it like an USB HDD.

So i use rufus (DD image and NOT ISO, 'cause it gives CD-ROM error), and make a Kali Live usb on another usb (32 gb). (2018.1 version).
I boot with it and proceed with installation "normally",using the 32 gb live usb to install Kali on the 16gb usb stick. I tell it to use "Guided: entire disk".
I then install grub on the 16gb usb stick. Installation completes normally.
After reboot, i F11 (boot menu hotkey) and hit the 16gb usb to boot.

All i get is black screen with a blinking cursor on the upper left corner. That is my problem.
I realise usb 2.0 speeds are low, so i have let it blink for over 20 minutes.
Physically ejecting the usb stick seems to have no impact. Putting it back, also. Different ports, also.

I think i am missing something critical.
I can't get to boot grub is all. Is it installed on wrong partition on USB?

PS: I've read about UEFI, GTP Partition, Secure Boot option, Fast boot etc, i don't think they apply to my problem.
Northbridge chipset is Intel P35
I also use the default option to put /home, /var and /temp all together or something like that, the newb approach, the first option.

PS II : Booting the 32gb live usb, gives me access to 16gb stick. I can see all linux folders, bin, boot, dev, etc, home etc. I can see file grub.cfg in 16gb/boot/grub.
fdisk -l gives

Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 22102015 22099968 10.6G 83 Linux
/dev/sdc2 22104062 30488575 8384514 4G 5 Extended
/dev/sdc5 22104064 30488575 8384512 4G 82 Linux swap / Solaris

and also a new device, not know if relevant.

Disk /dev/loop0: 2.6 GiB, 2775728128 bytes, 5421344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Where is grub installed, on /dev/sdc1 ?
What is a master boot record? Does usb has one? Is grub installed on MBR?
Why doesn't grub load? How to load grub?

Thanks in advance for your time, and your help.

[IlllIll]

At last i managed to install kali linux on a usb stick.

After answering no to whether i want to install grub on mbr, i installed grub MANUALLY on my usb stick, that was /dev/sdx. Where x is usually b or c, etc.

After reboot and choosing the usb to boot, i am able to get in kali.