]I have 10 shapefiles in source folder.
I made a model, which use iterator iterate feature classes and tool the feature class to feature.
I would like to merge multiple shapefiles into a single geodatabase feature class.
Problem is, that gdb contain only last shapefile and not all in the source folder.
personal-geodatabase
which was an 8.x format which now unavailable in Pro. Do you really mean file geodatabase?