Hello, Canvio Basics HDTB420EK3AA 2 TB Portable HDD works with USB-A connection as standard. Several conditions need to be met in order to connect directly from phones and transfer data: � � Is a direct connection possible? If your phone supports USB OTG (On-The-Go) functionality and you have a suitable USB OTG adapter, you can transfer photos by directly connecting the hard disk to your phone. However, you need to pay attention to: The external disk must be in FAT32 or exFAT format (NTFS format is not supported by all phones). If the disk doesn't find enough power from the phone, it may not work. In that case, an external power source may be required. � � Alternative Method: If a direct connection isn't possible, you can transfer photos from your phone to your computer and then copy them to this external drive. This method is more common and hassle free. � � Summary: Yes, direct connection may be possible if certain conditions are met; however, the most hassle-free method is to first transfer to a computer.