[Original writeup](https://bigpick.github.io/TodayILearned/articles/2020-04/wpictf_writeups#-zoop)

Go to website given, http://zoop.wpictf.xyz

See that if we click the Attach option, there’s a **Preview** button. If we try a common file name for flags, flag.txt, with the given storage.zoop prefix, we get the flag.