[Instructions on adding unsafe -up under for system]--The USB4.O hard disk box runs the USB4ITB4 protocol on the device for system, so even if the device is launched and unplugged--the device will still be unsafe. The number of shutdowns requires pushing the device out first and then shutting it down. The number of unsafe shutdowns will not increase. Because the protocol running on MacOS is the USB4 protocol, our chip only acts as a channel. The disk is directly mounted on the PC positive interface on the motherboard through this channel. At this time, it is a PC positive device. Supports USB ejection function, the system will safely remove PCIE devices only when shutting down. There is no problem with the USB device on the Win system. Please be aware of the relevant knowledge. It is not a product performance failure. If you are not interested, please be careful. Thank you. Interface: TYPE-C female connector Product rate: USB4.0 40Gbps backward compatible with 20Gbps/10GbpsI5Gbps Support protocol: PCI-E AHCI/NVME SSD Main control chip: ASMedia ASM2464PD System support: for WIN10IWIN11IMACILINUX Supported interfaces: USB4.0/ 4/USB3.2/USB3.1/USB3.0 Material: abs colour: Black Package Contents: 1 x Solid-state SSD hard drive box 2 x Adapter data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.