Pros
Seagate takes good care of its employees and the overall work environment is clean and fair. Within the limited budgets they have, the HR tries to manage the rewards reasonably well. If you can prove your value, typically the management will let you run your own show and manage your product or segment. You will work with some very smart people, especially on Product and business marketing side.
Cons
Pay is not the best as compared to thers in Technology sector, or even as compared to broader storage industry. Growth opportunities are limited. Once you've worked at Seagate or WD, where can you go next? There is quite a bit of politics between the old Seagate guard and the people they got from WD in 2016-2018 timeframe. One major issue for me was that they lost all employee information to a phishing attack and did nothing much to address it. It shows weak controls and apathy for employees' data. That attitude is a problem. Diversity - At the management level, Seagate is still a white male dominated company with minimal diversity. It doesn't impact day-to-day operations, but limits some growth opportunities if you're not in the club.