Hii and welcome !

? 1... Are you talking about trying to move 'partial' (incomplete) downloaded files, or..
Simply wishing to copy and/or move existing completed downloads ?
(Copy and then Paste is NOT the correct procedure.)

? 2... What Operating System are you using ?

Don't panic... This is going to be an easy one for you !

__________________
Fusion for REAL!--CDex 1.51--Wackyuses--Bitzi - Check Files Before Download !--.mp3 File Name Change Problems? Try Rename-It!--Alternate PORTS--Avast- Anti-Virus--WindowWasher--IrfanView--PC Pitstop - Test your PC !--Mac OSX Troubleshooting--GO .ape ! - For 'Lossless' Audio Compression--Port :6346 - Test If It Is 'Blocked'--Cole2k Codecs--OldVersion - Newer isn't always better !
Nod32 - Free Virus Scan: Use ESET's Online Antivirus Scanner

Tomorrow's forecast:
Sunni in places, Shi'ite in others...