On ShareThis Share Buttons' Privacy Page you can request and collect all the privacy and GDPR related information that ShareThis Share Buttons is providing.
The privacy policy by is a legal document or statement that discloses how ShareThis Share Buttons gathers, uses, discloses, and manges their customers' data.
The basis for ShareThis Inc. sharing, adding, uploading, hosting, accessing or sending personal data out of Europe. Vendors can also add a description of their own impact assessment for data transfers.