I see that 2 other people have asked this in 2022 but I don't understand the technical coding stuff so I'd appreciate if someone could walk me through it.
I want to move my D sides (slot 4) and my SJ (slot 3) into my vanilla file (slot 1) for general tidiness, and so that I know I'll have a file clear for speedrunning attempts in vanilla.
My slot 2 is a friend's savefile which can be deleted if combining vanilla and modded files is too risky.
I have created a copy of my Celeste Saves file in case something goes wrong.
Thanks
#How do I merge savefiles together?
round turtle
velvet lintel
combining vanilla and modded saves are fine
it won't crash or anything
i could copy the data over though, can you hand over 0.celeste, 2.celeste and 3.celeste?
round turtle
round turtle
ok
velvet lintel
round turtle
so i just replace the 0.celeste 2.celeste and 3.celeste with the new one?
velvet lintel
is there other data in 2.celeste that you care about other than sj?
same thing for 3.celeste for d sides
round turtle
no
round turtle
ok thank you
velvet lintel
worst case scenario the files are over here if i did something wrong
round turtle
i have a backup anyways
velvet lintel
yeah exactly
round turtle
and do I also delete all of the 2-modsave and 2-modsession files too
velvet lintel
yea
they're tied to the third savefile
i don't think they're important, everything should be in 0.celeste
round turtle
ok thank you so much
velvet lintel
double check if the data is there 
round turtle
ill check yeah
well it copied over fine but save files 3 and 4 are still there but i can just delete them from the game menu i think
velvet lintel
yeah you can
round turtle
ok its all good now thank you
velvet lintel
happy modding
spark apex
heyo
would that work if i specifically wanted to transfer data from three lobbies of SJ to my main save?
velvet lintel
well yeah