The EZ-Clone USI-2535CLU3 is a USB 3.0 to Dual-SATA & Single-IDE Hard Drive Adapter that also works as a standalone disk-cloning duplicator. The EZ-Clone adapter provides support for two SATA (SSD or HDD) drives and one IDE hard drive in 2.5" or 3.5" form factors. Access up to two external drives at the same time (two SATA drives or one IDE and one SATA drive) when connected to the PC. The EZ-Clone also works as a standalone disk duplicator (IDE to SATA, or SATA to SATA) while disconnected to the PC. Easy to Connect Connecting the external drives is simple and easy. The EZ-Clone adapter comes with following drive interface: IDE Source - for connecting a 3.5" IDE drive. SATA1 Source - for connecting a 3.5" or 2.5" SATA drive. SATA2 Target - for connecting a second 3.5" or 2.5" SATA drive. Another unique feature of the EZ-Clone is the stand-alone disk cloning feature that allows you to duplicate or clone the entire IDE or SATA source drive to another faster or larger SATA drive without having to connect to a computer. Simply attached the IDE or SATA source drive and the new SATA drive to the SATA2 Target connector, then turn on the EZ-Clone power and press the CLONE button for 3 seconds to begin the cloning process. The EZ-Clone has 4 progress LEDs (25%, 50%, 75%, 100%) that will turn blue to indicate the completed percentage of the clone process. The result is two identical drives containing the same files, boot sector, partition table and file system format. If the target drive is larger than the source drive, the remaining partition of the drive that was not used during the cloning process will be converted as an unallocated partition. You can still repartition and format that partition as extra logical drive.