Help Random 1GB files appearing on SD


Hello all.

I have noticed that recently random 1GB files are appearing on my 32GB micro SD card. They have weird symbols for the name and extention, here is a name of one of the files: ╪╜a0╜a (followed by a similar 3 character extension). They are all the same size, all have either a lower or uppercase a before the extension and have weird creation dates, some are in the year 2100 and others in the 1990's, and they all also end with the minutes .43 AM or .13 AM, example: 08/06/2101 7.13AM

I'm unsure as to their source, I have not installed any new apps since these started appearing. Perhaps these are temp files?? Any clue what they are and whether they are safe to delete?