Multiple safetensors output

[CrisOrlandoBR]

Hello, I am new here and I started to use Kohya yesterday
My data set was big (almost 700 images) and I was able to make it work (almost 15h using a dual xeon x99 2011-v3 18/36 and a 4090 GPU (gonna try using my Ryzen 9 with a 3080TI too)

But here is the thing = It created a lot of safetensor files
There is one with the output name and it also created more 49 files with the same size (NAMEMODEL-000001 to NAMEMODEL-000049
All files have the same size (220mb) and I used a big pretrained model (7gb)
Is this ok ? Do I have to merge those files or they are the same ? If so, is there a script to merge a large number of safetensors ? I checked some extensions and some github projects with safetensor mergers, and they are usually made to merge just 1 to 3 files...

And in image folder I have a lot of NPZ files

Do I have to delete them ?

Tks