I can not add plot from drive

A just started to plot yesterday morning 7 pots with my new machine and finished it in about 12 hours. In my chia program the process was at 100% and after checking the log file i saw that the stage 4 was done. My 7 plots were copied on my HDD (101 GiB per file) so i stopped the chia program manually. After opening it again i realized that my plots were disappeared and i tried to add the directory but chia does not do anything. So, stared to plot again on another HDD.
Does anyone know why that’s happened ? Did i lost my plots for ever?

425 plots disappeared from my HDD
what can i do?