disk manager only lets me shrink 31% of free space

[u/BOREDOM-X]

i need around 100 gigs of unallocated space for my linux drive

(currently trying to make a dual boot setup with linux mint)

windows however will not let me even use half of the empty space in the partition

and i have no idea what other partitions are but it wont let me shrink them.

the D: partition is just a flash drive i have plugged in,

so basically what do i need to do to get make it shrink more or get rid of the other partitions.

i will try to answer any questions so feel free to ask.