Maaaassssssive files! Ahhhhhhhhhhh
(Foxhyode gave me the same talk about not rendering excessively a few jams ago lol, 48 khz is definitely fine)
Anyways - first track I feel like it could use a bit of a slower tempo to more gradually build that tension.
Do you have a midi controller? That's the best way to make virtual instruments not sound as quantized and have more organic dynamics with a lot less time to do it.
Clearly you do have a midi controller listening to the second track. Use that for the strings and drums. I get it if you were running out of time. I ran out of time to polish mine and I ended up changing the composition
Second track is really pretty and moody in an interesting way. I think it could use a little bit more development, like playing a melody an octave up with the piano or strings/flute or something like that, especially a legato melody as a texture to really round it out.
Great work! :)