FME_SHAREDRESOURCE_TEMP and FME_SHAREDRESOURCE_DATA as a System Parameter that a user can preset the UNC in Desktop, Server/Cloud:
Desktop:
FME_SHAREDRESOURCE_TEMP = D: emp
FME_SHAREDRESOURCE_DATA = M:myprojectmydata
Server/Cloud:
FME_SHAREDRESOURCE_TEMP = /Resources/Temp/temp
FME_SHAREDRESOURCE_DATA = /Resources/Data/myproject
FME_SHAREDRESOURCE_TEMP and FME_SHAREDRESOURCE_DATA parameters can be used in a workbench for reading and writing data. When run on Desktop or Server/Cloud the data is read from or written to the specified location, no adjustment of the UNC in the workbench required between environments and no need to setup your local folder to mimic Server. Discussed with @smaccabe

