system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How large is the memory bank of an astromech like R2? He’s seen so much. How can he remember so much information?
gpt
R2D2 was able to retain all memory despite never having been wiped.  He was also able to retain a copy of C3PO's memory, who had not been wiped in several decades.  It's seems that their memory bank size is "don't worry about it" or rather, unless you are dumping huge numbers of files for off label use, you aren't gonna fill them up.