Long time of creating VM checkpoint on file share storage

Hi,

Why VM checkpoint creating time so long ~6min  on file share storage ?

RAM of VM 10Gb

Same VM on local disk checkpoint creating time <3s

When I reduce RAM size of VM to 1Gb - checkpoint time <1min

When checkpoint was creating I looked to file share storage server and Hyper-v server performance monitor and found that disk and network activity was loaded as usual.

Thanks