Richwell 3 in 1 128G Type-C + Micro USB + USB 3.0 Metal Flash Disk with OTG Function 1. 3 in 1 (Type-C, 8 Pin , USB 3.0 )Flash Drive 2. Installation: External 3. Material: Metal 4.Equipped with USB2.0 adapter. 5.Support manage Data directly on the FlashDrive. (Create, copy, move,delete, rename, open and so on). 6.Format support:common image format,such as MP3, MP4, Mov, MPEG-4, flv, RM, RMVB and other video and audio format.Maximum support 1080P.mp4 video format. 7. System: support all android phones with OTG function and laptops or desktops with USB port About real capacity Capacity flash memory products are usually shipped in accordance with 1MB = 1000KB, 1G = 1000MB computing, but the operating system using binary arithmetic 1MB = 1024KB, 1GB = 1024MB, so there are some differences between the display capacity and standard capacity memory products.This is calculation difference between manufacturer and our PC 8GB =approximately 7.2GB-7.5GB 16GB=approximately 14GB-15GB 32GB=approximately 28GB-30GB 64GB=approximately 58GB-59GB 128GB=approximately 115GB-120GB Attention: To avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer. Please do not remove your USB flash drive when it is being used otherwise your data may loss. After using USB flash drive, it is better to remove it as soon as possible. That will helps to extend its storage lifetime. Please do not format your USB flash drive frequently, otherwise the USB will be damaged easily.