Hi guys,
In my mind it was perfectly clear that these encoded files should be small files (10K or less). I should have communicated that from the beginning but, forgot to do so. I originally made the b64 encoder/decoder file for just such small files for posting on forums that don't allow posting attachments. Then as a way to attach small files to forums to avoid inevitable 404's after expiring from free file/image sharing sites.
If transferring larger files then use a compression utility like 7z (free), RAR (commercial), or even ZIP (included with Windows 10).
Cheers :)
p.s. @bplus
Ogg Vorbis is a variable bit-rate music encoder. It's most likely that the .ogg file you were wanting to use, is a high bit-rate file (256k/s or more)
Attached is a low VBR (variable bit-rate) version and a 185k version of xmas.png