A filing cabinet stands for order, records and the past kept in its place. Overflowing files are read as obligations or memories that have outgrown your system.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.