Cant drag and drop from one Mac to another Macs shared folder?

i have g5 , mac pro. g5 has bunch of shared folders on can access of stuff computer on mac pro.

problem is, if open finder on mac pro, go shared section , click on g5, see shared folders. can't drag mac pros desktop of folders. white circle slash through under icon i'm trying drag g5. shared folders have read & write permissions admin, wheel , everyone. why can't move files shared folders? have on mac pro?

 

and folders show being shared in system preferences > sharing > file sharing? if so, click options button. have checked there?

mac 101: file sharing

 

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