formatted drive in disc utility showing a new file/folder to me.

[ChrisBuzz]

I erased a couple of ext HDD with disk utility on my High Sierra 2011 Imac.

When I opened the newly formtted drive it has a folder called .Spotlight-V100 and 1 called .fseventsd.

I dont ever recall seeing these before. what are they please ,
Mac os extended (journaled) format

thanks

 

[ChrisBuzz]

thanks Chris,
had a look to see if i could find a way to hide them but so far not

 

[ChrisBuzz]

thanks Feek, that did the trick.