What you'll need:
A Shinki Cradle (obviously)
A 2.5 inch SSD (Samsung 850 EVO 250GB/120GB recommended bcuz their BCP are small enough)
A USB to SATA cable, better with status indicator light. heres what I bought: https://www.amazon.ca/gp/product/B011M8YACM/
(You can also use some other kinds of cables or SSDs, like a M.2 SSD or mSATA SSD.)
A nice screwdriver
If you want to modify the LED into a hard drive status indicator (or at least a power indicator):
Some jumper wires
A 5mm light emitting diode, aka LED (Use the one in the cradle if you want. You can also use RGB LED like me.)
A resistor, 100-200 ohm (USB ports provide 5V DC current while LEDs usually work at 2-3V. Connecting the LED to the USB power without any protection will kill the LED. However, you don't need the resistor if you want to directly replace the status indicator on your USB to SATA cable becuz it's already 3V.)
A few 1mm heat shrink tube to prevent short circuit.
Hot glue gun and glue sticks (Use this to strength the wires connected to the PCB of the SATA module. They may easily break after you remove the plastic cover, and that'll be extremely hard to resolder them in place. So apply the glue before this happen)
Some sponges or other kinds of filler that can stop the hard drive from moving in the cradle
A small heatsink to dissipate the heat generated by the SSD controller (It's like a small CPU that controls the SSD). This is what I bought: https://www.amazon.ca/gp/product/B010ER7UN8
In this photo, you can see how I connect my wires. Note that resistor wrapped in the heat shrink tube. That wire connects the green pin of my LED to the USB power. Another red wire without the resistor connects the blue pin to the anode of the removed mini onboard LED, used as the status indicator. And the black wire connects the common cathode pin of the LED to the USB ground.