Don't think so.
First of all I would try to assign the Everyone group with all rights to both the Sharing and Security tab (when you right click the shared folder).
For sure only for testing, depending on your network you might not want the everyone group to access the share.
Can't include a English Windows screenshot, so I go for Dutch instead. It's Delen (=Sharing) and Beveiliging (=Security).
Well, thinking back to my good old networking days, that's before august and when I was thrown in the deep at my new job and Switch, that aside. Back then I hated guest access, and the easiest way to gain access to another workgroup computer, and don't struggle with permissions, is to create a user account on both the computers with the same username and password (no blank password). Definately the easiest way to be sure you don't run into permission issues.
So if your switch is running under PC-01\Administrator with blank password than give that account a password, and do the same with PC-02\Administrator. Ah well, that might be lazy, but for sure can help you
Sander