For college students, there are quite a lot of learning materials. You should first prepare a 64G USB flash drive (the current USB flash drive is not too expensive), which is convenient for carrying and taking temporary or important information at any time. For some large teaching materials and video materials, it's best to prepare a 1T or 2T(2T is cost-effective, JD.COM, Suning and Tmall can check it, find the right one, and it's best to choose an excellent brand to buy it. For example, Seagate and Western Digital (WD), the oldest hard disks, must be prevented from being greedy and cheap, and the saved data will not be worth the loss), so that it is convenient for universities to store the data in the next few years and consult them at any time (set up corresponding directories to facilitate searching).

The map of mobile hard disk provided below is for reference only. You can consider a 4T mobile hard disk if you have sufficient funds.