1. Whether information will be leaked depends on the security of data preservation and data transmission. Your data is generally stored in the server, card, program (app, software) you use on your mobile phone. It is difficult for you to ensure that all this information is 100% secure. Just install a junk software, and the information on the mobile phone and card will be easily leaked. A mobile phone is equivalent to your computer, and a card is equivalent to a mobile hard disk or a USB flash drive. Think about your own computer. If it is on someone else's server, you can't control whether it is safe or not.
2. Let's talk about transmission security first. When you log in to QQ, the data will be sent to the QQ server to verify the account password. It is also possible that this process will be hijacked. When you log on to the bank website to fill in the account password and transfer money, if this website is fake, then your information may be stolen directly.
All right, that's all. Back to your question, I would like to ask, if your computer used a mobile hard disk A before, and then it broke down, or the speed was slow, it was replaced by a mobile hard disk B, would your information be leaked through B?