I haven't finished sorting everything out, but Term 31's Frontal Muscle tutorial seems like the only thing completely missing. Term 54's d_vahri.psd is missing, but I suspect that this is Sakimi-chan's fault. There's an oddly placed steps.psd of this image instead.
As for the tutorial Google Save Drive, missing are:
{Term 034} _ Elegant Elf Necklace Tutorial
{Term 066} _ Photoshop Painting Basics Tutorial
{Term 070} _ Simple to Complex Light/Shadow Tutorial
{Term 083} _ Quick Background - Photo Integration Tutorial
{Term 104} _ Exagerating Proportions Tutorial
{Term 105} _ Squish Physics Tutorial
Term 106 and on...
Of course Term 31's Frontal Muscle as well. Besides 31, the rest can be found in OP's Full Terms or SAAVEDRA's shares.
The follow tutorials on the Save Drive I replaced with a better versions found in OP's Full Terms:
{Term 034} _ Composition 101 - Back to Basic
{Term 034} _ Nude Fullbody - Female Pose Tutorial
{Term 035} _ Polish/Refining Part 1 Tutorial - Dark Unicorn
{Term 035} _ Fantasy Elf Dress Tutorial
{Term 035} _ Hips Vol.1 Tutorial
As for the .jpg I moved so much around that it's hard to remember which pictures OP's Full Term may be missing - if any at all. I do recommend remaking the "pictures only" section. There were clear discrepancies there. Then again, most people who do not pay attention to resolution aren't going to mind or notice.
That is everything I can remember. I wish I took better notes of my sorting process. I do need to reiterate that you guys are doing a great job! I found nigh everything I could've wanted in this one-stop-shop. TYVM!
EDIT: fallen.psd from Term 44 is missing as well. Not sure why. Might be Sakimi-chan again.