I have a computer:
Dell Precision M50
Intel Pentium M 1.80 GHz
HDD Hitachi IDE ATA 40 GB 5400
I want upgrade HDD.
Does M50 support HDD on 160GB ?
Read this and see on Description
Compatibility with Precision M20, M40, M50, M60, M70
Ask the seller. The BIOS on the system you have will show 137 Gbytes for the drive size, if the system boots at all - some of the C-series will not even boot reliably with a larger drive installed.