In MS Access accdb Microsoft introduced a new data type called attachments. Many types of files can be stored in a column which has the attachment data type. Someone can add bitmap files, jpg files, sound files, word documents, etc. to a column without increasing the size of the database.
If you need to make changes to records or move a group of records in MS Access, you may want to use an action query. This article explains what an action query is, as well as one of the four basic types of action queries.