Can i upload files into Salesforce attachments files and documents?

The answer is: Yes Yes Yes.
When working with Salesforce there is the Classic version and there is the Lightning version...there are attachments, files and there are documents...and each user works a little differently in his account.
FormTitan strives to give all its users the best solution, so we like to try and cover all of the scenarios. In this case - we support your forms' uploaded files to 3 Salesforce entities: the attachment, the file and the document.

How is this done? 
Read about pushing a file to salesforce
Read more on mapping your salesforce attachment / file / dcoument to an image field
Watch the video to see how to Add an attachment to an account object in Salesforce