HP Envy TSM6 SleekBook TOUCH AMD A10-5745M 4GB No HDD/Caddy/Battery+SJ787 | eBay
No HDD caddy? No problem! (explanation in comments) : r/techsupportmacgyver
Amazon.com: ZXUY Hard Drive SATA 2nd HDD Caddy Tray for Unibody 9.5mm Laptop CD/DVD-ROM Drive Slot (Replacement Only for SSD and HDD)
hard drive - How to firmly secure hdd caddy in its bay? - Super User
Amazon.com: HIGHFINE 2nd 2.5'' SATA HDD SSD Hard Drive Disk DVD CD ROM Optical SuperDrive Caddy Tray Adapter for Apple Unibody MacBook/MacBook Pro 13 15 17 Early mid Late 2008 2009 2010 2011 2012.etc : Electronics
Universal 9.5mm/12.7mm Second HDD Caddy SATA 3.0 Adapter SSD HDD | Safa Computers