Zend certified PHP/Magento developer

Periodic data transfer between HDD and SDD

While sending a big file from HDD to SDD I realized that the transfer speed from HDD plateaued but receiving speed on SSD shows a periodic behaviour.

Screenshot from my Task Manager

Is there some hardware/SSD internal software reason behind it ? Is it the resolution of measurement ?

  • HDD: ST1000LM049-2GH172
  • SSD: WDC_PC_SN520_SDAPNUW-512G-1032

Thanks!