Records are filed vertically because it is a common practice to store documents in a vertical position, such as in filing cabinets or shelves. This allows for easy access and organization, as each record can be easily identified and retrieved. Vertical filing also maximizes space utilization, as records can be stacked one on top of the other, making efficient use of storage areas. Additionally, vertical filing helps to prevent damage to the records, as they are less likely to be bent or creased when stored in an upright position.