This article describes the specifics of SSD drives work that occurs when single files are deleted. The differences between SSD drives and traditional HDD-type drives in terms of behavior when deleting data are considered. The mechanisms of SSD operation that affect storage and deletion of data on drives are considered. Analysis of behavior of a number of SSD drives with the NTFS file system with support of TRIM and Deallocate commands is carried out. A study of behavior of drive with anomalies in TRIM operation is carried out. The conclusion about the possibilities of software data recovery on SSD is made.