My laptop has Win10 and a memory of 128GB.
60GB of it are occupied.
How big does a USB stick have to be for a full backup?
I have 72 GB on the Win disk
A USB with 1TB on which 10 to 15 GB are permanently. So there's space upwards - it only overwrites the old files when the stick is full.
Why so big, isn't 128GB enough?
That would currently be 64GB
But I would take a 128 GB, they only cost 10-12 euro, then everything will fit on it in the future