Here is how your storage space is being used.
Backups 0 MB
Emails 0 MB
Files 259.78 MB
Trash .95 MB
Logs 0 MB
PSQL 0 MB
MariaDB 20.73 MB
Total 281.46 MB
1.5M /home/pokemonwawi.helioho.st/httpdocs
224M /home/pokemonwawi.helioho.st/disneywawi.helioho.st
12M /home/pokemonwawi.helioho.st/sora.moss.helioho.st
9.4M /home/pokemonwawi.helioho.st/maplewawi.helioho.st
656K /home/pokemonwawi.helioho.st/savanna.drumz.helioho.st
156K /home/pokemonwawi.helioho.st/mycrypto.helioho.st
676K /home/pokemonwawi.helioho.st/pricebot.helioho.st
13M /home/pokemonwawi.helioho.st/test.helioho.st
32K /home/pokemonwawi.helioho.st/test2.helioho.st
124K /home/pokemonwawi.helioho.st/pokepricebot.helioho.st
24K /home/pokemonwawi.helioho.st/.nodenv
4.0K /home/pokemonwawi.helioho.st/.phpenv
120K /home/pokemonwawi.helioho.st/.rbenv
12K /home/pokemonwawi.helioho.st/.npm
Your total storage usage is only 281 MB so I guess you already figured out where the 700 MB was. One thing that confuses people frequently, is if you delete files it can take up to 24 hours for the storage total to reflect the change. So if you're using 700 MB, and then you delete 419 MB Plesk can continue to report that you're still using 700 MB for up to 24 hours even though the files have already been deleted.