When I work in my Filezilla FTP I like to see my images in MB. Easier to see if they are to large. I keep an eye on them and once in a while resize too large of a photo for my catalog. To view your photos in megabytes you can change the view for this. Log into your FTP and at the top click on Edit, then settings, then on the left you will see interface and below that you will see filesize format. Select "decimal prefixes using si symbols", make sure that "use thousands separator" is also checked off. Click Ok and your all set