512mb is equivalent to 0.5 gb. it is half of a gb
There are uncountable types of USB flash drives, with sizes from 512MB to 256GB!
The amount of gigabytes you should get on a flash drive depends on your specific needs, otherwise the more the better
You can't. A 1 GB Flash Drive will only have a capacity around 1 GB. Short of modifying the actual hardware, your 1 GB flash drive will always be just that; a 1 GB flash drive.
1.512146 × 10-5 gigabytes
How many movies a 64 gb flash drive can store depends on the length of the movies. If eacah movie is about 2 hours, then the flash drive can hold up to 21 movies.
0.25 GB
Approximately how many hard-copy pages of documents could be stored on the flash drive by an employee.
A 32 GB flash drive can hold about 2050 MP3 files. A 32 GB flash drive will hold around 64 MP4 files, depending on how long they are. USB flash drives are able to be written over if you want to delete the information.
About 2k songs.
It can hold about 1GB to 8GB.
For the needs you listed, you will need a flash drive of under 1 gigabyte. However, this is assuming you will have just text. Pictures take up more space and depending on how many, you might need a larger drive. If your funds allow, an 8 gigabyte drive will be a very good purchase for general needs.
There are many places that sell thumb/flash drives with more than 64MB. I have seen them all the way up to 512MB (if you're going for megabytes), or even ones that are 32GB (and I am pretty sure a gigabyte is bigger than a megabyte).