These are the JetDrive Lite expansion cards from Transcend, specifically the JetDrive Lite 330 for the MacBook Pro 2021. With the JetDrive Lite expansion cards, you can quickly and easily gain additional storage space without having to upgrade your MacBook. Simply insert the JetDrive Lite 330 into the card reader slot on the side of your MacBook to instantly increase your storage capacity. With up to 1 TB of available storage, you can store RAW images, 4K videos, music, and much more. Your creativity knows no bounds. The JetDrive Lite 330 offers read speeds of up to 95 MB/s and write speeds of up to 75 MB/s, fully utilizing the power of your MacBook. It’s perfect for Time Machine backups, iTunes libraries, and everything in between. The JetDrive Lite 330 expansion cards from Transcend have a slim profile designed to fit seamlessly into any MacBook model without protruding awkwardly. The JetDrive Lite expansion cards are manufactured using advanced COB (Chip-on-Board) technology, making them water, dust, and shock resistant. Whatever adventures you want to embark on with your MacBook, the JetDrive Lite 330 will support you.