Android devices normally come with a USB cable to connect the device to a PC. You should then be able to drag-&-drop (or copy and paste) the file into a relevant folder on your tablet. (The 'Music' folder would do).
Otherwise you could try emailing the file to yourself and then accessing your mail via your tablet. However there might be a size limit on the attachments that your email service can handle. In which case you upload the file to an online hosting service and then download the file (from the link provided) with your tablet. My favourite file hosting services are
http://upl.co/
and
https://myfile.is/