Size:E6400 Caddy The Hard Drive Bay Adapter gives you maximum storage flexibility. enabling you to add a second ThinkPad notebook Serial ATA hard disk drive into the Ultrabay media bay of systemssupporting Serial ATA drives.With the second HDD in your Ultrabay, you have the fastest way to back-up key applications and critical data.Compatible Hard Disk : 2.5" 9.5mm SATA Laptop Hard DriveHDD Interface: SATAMachine interface: SATA1. Fast & Reliable connection in laptop, just as the primary HDD2. Fully integrated into laptop, no cables/PSU/software driver needed3. Dual boot, Support installation of 2nd operating system on the 2nd HDD and boot selectionGreat for backups or if you just need more space! Another thing you could use is to have a complete image of your main hdd (which has operating system), you always have a peace of mind knowing that you have a complete good working HDD backed up, whenever the main drive is infected with virus or spyware, you could take the back up and swap with main drive, do a complete image of it, then swap again, no need to re-install the OS and all applications.Compatible with DELL Latitude E6400,E6500Precision Mobile M2400, M4400
