@timreyes Thank you for your feedback.
Sorry I try again is :
I set Saleae software the memory buffer size to 4 GB,
although Saleae software display the memory usage does not go above the set memory value of 4 GB during the continuous recording.
But after about 2 hours of continuous recording, the PC memory began to be slowly consumed.
I am running on Windows 7 Professional Edition 64 bits.
The following figure shows the memory usage after 17 hours.
Because the file is a bit big, upload it to google driver. Here is my capture preset, please refer to the link. memory buffer size 4GB.sal - Google Drive