I transferred a large amount of data from my laptop to another laptop's HDD via USB adaptor (windows 10 on laptop) but when I reinstalled the HDD to its laptop. I couldn't find the data on any of the 2 prtitions. I did a restart, under the windows logo, it said scanning & fixing drive C: After boot, I could find the data on drive D: & some of the data on Drive c: but an about 70 gigabytes folder is missing & the disc space is not occupied. How could this happen ?