We store what's necessary to make using our service possible, and nothing else. We don't share your email address with third parties, ever.
It's far too often the case these days that folks' personal information is being used with malicious intent, but seriously: we only store your personal information in order to give you the smoothest experience with WeTransfer possible.
After a maximum of 12 months, your information will be automatically anonymized, or pseudonymized, and it'll be as if you never visited us in the first place.
You're more than welcome to have a look at our Terms of Service and Privacy Policies, which go into much more detail regarding how we handle your personal information, and what retention procedures are in place, here.
Of course, if you'd like to discuss your personal information, or would like some more detail about our policies, please do give our Support team a shout, here.