I was recently walking on Camino Ingles and needed to forward extras to Santiago.
The options seems to be
(1) by taxi - expensive - 65 to 70 euros
(2) by bus - someone will need to pick up the package and store it for you.
(3) by post.
Option (3) worked well for me. Cheap and safe. Cost me all of 8euros to send a 4kg box from Betanzos to Santiago by Express Post. (I had used express post because I had only one working day before I arrive in Santiago).
Should you need to have the things kept for more than 14 days, perhaps they could be sent to :
Ivar Rekve
ATT: [Your name goes here]
TravesĂa da Universidade 1
15704 Santiago de Compostela
La Coruña
Spain
Sometimes they ask for my contact phone number. If so, please use: (+34) 603 466 490
Prices:
Small box (317x215x125mm): €15,- for 60 days of storage
Medium box (390x290x190mm): €20,- for 60 days of storage
Large box (590x390x390mm): €25,- for 60 days of storage
(info is as per post by Ivar)
(Updated by Ivar)