Patch 1.3 adds the ability to store items that players may wish to save for later use, without forcing Geralt to carry them everywhere he goes. The storage interface is accessible by selecting a new dialogue option ("I'd like to access storage.") while speaking with certain characters, or by interacting directly with a nearby storage chest using when "Store or collect items" is displayed. Items left in storage are automatically transported between chapters. Although storage is free, there is a possible bug which prevents items from being collected from storage if Geralt has no money.
Dyson Beaver and the chest in the southwest area of the lower level of the Flotsam inn, near the door to the brothel. There is a known bug if you access storage in chapter I where your items can disappear if storage was initially accessed through Dyson and not the chest directly.Note: On the Xbox 360 version, the character who handles storage is actually Marty Beaver, the upstairs innkeeper. The chest can still be used, and remains downstairs just like in the PC version.
Your items from Chapter I are automatically transferred.
Raymond Gessler and the chest to the south of the Kaedweni camp followers' encampment on Roche's path (you will see brown houses across the river on map). Alternatively, Geralt can talk to the innkeeper and use the storage chest in his room at the Cauldron, if he follows Iorveth to Vergen.
Beware: On either path, Geralt will cross the mist / battlefield to get to the other location as part of a quest. If he is on Iorveth's path, he has access to the camp followers' encampment and Raymond's chest there. However, that chest will not contain any previously stored items, and any items added to it will not appear in the chest at the Cauldron. On Roche's path, entering Vergen is more difficult, but if Geralt does manage to get into the Cauldron, the chest there likely functions the same way.