So, there are several "weaknesses", but there are several advantages as well. With regard to the "weaknesses". I will give you two references. One addresses disadvantages and advantages from an IT business and service management perspective holistically. The other article is from a cybersecurity perspective.
Business and Service Management
https://www.jigsawacademy.com/blogs/cloud-computing/advantages-of-cloud-storage/
Cybersecurity:
https://blog.rsisecurity.com/top-5-disadvantages-of-cloud-storage/