.1 .2 .3 files appearing in computer

Hello,

In my C:/Users:/myName directory, 5 files appear which are:

myName .1
myName .2
myName .3
myName .4
myName.5

which seems a bit weird. I've tried a bit of googling of these .1 .2 ... files but am not really understanding why they're appearingn in my directory

Does anyone have any ideas? should I be concerned?

Thanks!