FreeLynx Record to SD 

In order to read the recorded data on the microSD card of the FreeLynx, Paragon software must be used.  It allows Windows to read the Linux data folder on the card.  All FreeLynx computers have this installed by Neuralynx.  When you insert the card into the PC, be sure NOT to format the card in Windows if prompted.   

Run the Paragon Software, it will automatically detect the data partition of the microSD card.  Paragon may automatically mount the drive.  If not, click the Mount button on the top menu bar.  Next, it will ask to assign a drive letter, choose any available option.  Next, use Windows File Explorer to open the assigned drive, this is not the drive named NlxOS.  You will see 1 or more files with the extension .crd.  These will be in numerical order, default_001.crd, default_002.crd, etc.  Each file is approximately 2GB, so one recording session can produce multiple crd files.  Note, if you do not delete previous recordings from the microSD card, the numbering will pick up where it left off, take note of the Date modified if required.  Copy these .crd files to your local data drive.  

Next, use the Neuralynx Wireless Raw Data File Converter to turn the compressed data files into CSCs.  Events recorded from the GPIO will be output as an Event.nev.  The Base IMU data can also be output at this time.  Each file, when converted, outputs the number of channels recorded to a folder matching the name of the original crd file.  Matlab and our import utilities can be used to merge the output CSC files into one, if you so choose.  

NOTE: When using a Bridge Board to connect multiple digital headstages to the FreeLynx, blank CSC files can be created.  Example: When running (4) 32 channel digital headstages, 128 channels will have data and 128 channels will contain zeros.  CSC 1-32, 65-96, 129-160, and 193-224 will contain data.    

TIP: Multiple file converters can be opened on one PC.  Single or multiple crd files can be run in each converter, speeding up the conversion process for the entire recording session.  Be sure not to select the same crd file in different conversion session to avoid overwriting files.  

Caution – Device for investigational use in laboratory animals or other tests that do not involve human subjects.