I got an old PC which needs a "bit" of upgrade
i need to upgrade the memory hard drive
hoping to work on the RAM as well
need advise sa pinakabarato nga ways

best stores to go to?
I was thinking of just getting the external HDD...is it cheaper this way?
and RAM wla ko idea ug unsaon pag improve
please ayaw ko tagai ug tekkie nga explanation kay ma nosebleed tawn ko

kanang inamigo lang na explanation
here's the specs (i hope i got all u need)
Drive: C:
Free Space: 1.5 GB
Total Space: 40.0 GB
File System: NTFS
Model: HDS728080PLAT20
Drive: D:
Free Space: 3.5 GB
Total Space: 38.5 GB
File System: NTFS
Model: HDS728080PLAT20
* Maximum Memory Capacity: 4194304 MB
* Currently Installed Memory: 512 MB
* Available Memory Slots: 2
* Total Memory Slots: 4
* Dual Channel Support: N.A.
* CPU Manufacturer: GenuineIntel
* CPU Family: Intel(R) Celeron(R) CPU 2.80GHz Model 4, Stepping 9
* CPU Speed: 2791 MHz
System Manufacturer: INTELR
System Model: AWRDACPI
Motherboard Manufacturer: Foxconn
Motherboard Model: 8657MF-series
DDR PC3200