Continuous sampling is not meant to be used in standalone mode, It is only meant to be used when connected to a computer. It allows data to be transferred to a computer in a continuous fashion. When the memory fills up in the logger it will write over the oldest data.
If continuous mode was used in error without a connected computer the data may be downloaded with DaqLab software if you first set the logger in a mode other than continuous. Do this in DaqLab by going to the LOGGER MENU then SETUP LOGGER then NEXT then NEXT. Select anything except CONTINUOUS in the Time selection box then click FINISH.
Now DOWNLOAD or SELECTIVE DOWNLOAD (In the Logger Menu) should be able to retrieve the data. Some of the data may not be available if it has been overwritten by the logger.