MGS HD Collection has 4gb+ files. These files can't be transferred to external drives with FAT partitions. You have to split the file before transfer. I use Split4g to do this. You can find it in full releases of Multiman. Open Split4g, browse to the MGS HD Collections PS3_GAME folder, Set a destination for the output, then verify to be sure its split correctly and size is the same. Transfer that to external and Play. You might wanna transfer it to the ps3 internal for MGS, External with the cached files is buggy.