i would remove everything that says acer in the name or in the publisher , driversetuputility, abfiles and abphotos
never heard of it, never seen a user of a acer laptop using any of those
if you don't use the office 365, i would wipe it, especially if your subscription is over, if you don't use onedrive, delete it
how much hard disk space do you have?
if you have used the pc, there could be some temp files that could be removed
you could gain even more space if you install form a clean windows installer the entire windows 10 than using the restore function from acer, i had to do that with my lenovo tablet