By the way, after that if you still find you need to shrink folder, you can either delete the table by TDP or compress some big tables.
all the local storage tables are MYISAM engine, table data is recorded in the corresponding MYD file. According to this article: https://blog-en.openalfa.com/how-to-compress-myisam-tables-in-mysql, you can compress table by this way:
open command prompt, execute following 3 command lines one by one:
cd C:\Program Files\Quest Software\Toad Data Point 5.1\DataHub\bin
myisampack "C:\Users<USERNAME>\AppData\Local\Quest Software\Toad Data Point Hub Data\data<your database>\your_big_table.MYI"
myisamchk -rq --sort-index --analyze "C:\Users<USERNAME>\AppData\Local\Quest Software\Toad Data Point Hub Data\data<your database>\your_big_table.MYI"
then you'll find your_big_table.MYD becomes smaller.
I did a test, my big table MYD file could be compressed to nearly 400M from 2G.
note the drawback of compressing is: the table becomes read-only, which means you can't update this table after compressed.