Defantech&reg; 2nd HDD HARD DISK DRIVE SATA Caddy Adapter For HP Compaq MultiBay II nc6220 nc6230 nc6400 6910p nx8220 nc8230 nw8240 Add this caddy to your HP notebook so you can enjoy two hard drives at the same time. Simply swap your CD-ROM drive with this Caddy (with added hard drive) and you are ready to go.Ideal for adding extra storage or back up data from primary HDD Replacement Part Third-party factory produce. accept 2.5"/9.5mm SATA laptop HDD Only 1 year warranty compatible with: HP Compaq MultiBay II nc6220 nc6230 nc6400 6910p nx8220 nc8230 nw8240