I purchased sony external hard drive model HD-E1 for rupess 4400 one year before. It supports usb 2.0 + usb 3.0. It comes with pre loaded softwares : DATA TRASNFER ACCELERATOR, BACKUP MANAGER, PASSWORD PROTECTION MANAGER , FAT32 FORMATTER. It is a very good external hard drive. I have only usb 2.0 port in my laptop, so I used it only on usb 2.0. Transfer speed on usb2.0 is good and with data transfer accelerator speeds becomes almost double. I recommand this product.
