Limitations involved in secondary data collection
Disadvantages are related to the credibility of the source who has published this info and the small nuances that may not fit into your research objectives.
Another disadvantage can be that the data might be outdated. Similarly you have no control over the quality of data and you do not know how authentic the measures
used for Data Collection have been.
Secondary Data Collection can be obtained from various sources, which include, but are not limited to: Books, Magazines, websites, already published reports, TV, Radio, Newspapers, Films, Journals and publications, Research papers etc.