My tour guide and my air bnb host told me to be extra careful at El Corte Ingles department store. My air bnb was right across from it so I went there to do grocery shopping. Nothing happened to me but I did see some sketchy looking people snooping around.
Jamon! !! 5j stuff. Got some from boqueria and stuff was amazing. (Again), my guide told me not to cheap out and go for anything below 15 euros if I wanted some real stuff. Not sure how true it was but paid 18 euros ish at boqueria and shit was delish!
I went to La Fonda for paella. It was total tourist trap for me. My rice came uncooked
Toscas for tapas - they had pretty good food there
Transit runs 24 hours on saturdays but lot of stores are closed on Sundays, so work your schedule around that.
I think that's all I remember for now. Have fun in Barcelona