The best way I have found to send files is through "We Transfer". It is a free service.

Find it here: wetransfer.com

Please send directly to my email: 

johnkutkowski@gmail.com

Remember to include your contact information so I can get in touch with you over any questions we may have.

You will receive an invoice after the files are reviewed with payment link via email.

Not sure how to output your files? Watch this video and please read instructions below.

How should I prepare my files for the mix?
You will need to output your individual tracks as WAV files. Please send Wav files in their uncompressed format. Other file types and up to 196k-64bit can be accepted but confirm with us first. Don't upconvert or down convert when outputting. Send it to me in its original recorded sample rate if possible. Feel free to call with any questions.

Please bring the faders to unity gain (0). If your faders are very low, the resulting bounced files will also have a very low volume. Also, please remove any effects such as EQ's, reverbs or delays with the exception of an effect that is a integral part of the sound (for example a guitar with flanger). When in question, just bounce two copies of the sound, one with the effect and one without.
If interested in re-amping be sure to send your direct guitar tone track without any EQ etc..

Output your tracks individually to stereo or mono files.

Most importantly, make sure each audio file is bounced from the beginning of the music to the end, in other words leave a measure or two in the beginning and end of your export range on all tracks. These should be bounced from bar zero and all be the same length and the same sample rate.  This way, everything will line up correctly when I import the files into my DAW.

Please supply me with the tempo in BPM of each song as indicated on your DAW and any useful information on the song production. Give me a reference link or links to songs you'd like the mix to emulate. Again, a quick phone call is the best way to insure we are on the same page.