What cross-platform software for testing/checking a hard drive's condition/health would you recommend?

cross-posted from: https://lemmy.zip/post/23695798 or https://lemm.ee/post/43700421

Also open to recommendations for similar diagnostic software for other data storage media like SSDs, flash drives, and SD cards. Just wanted to keep the title short and specific. If you're making recommendations for tools for the other types of media, please mention that.

Thanks in advance!