Bitcoin Forum

I do not have enough space on my computer to download the entire blockchain, so i have a 128 gb flash for this. How do I install bitcoin-qt to the flashdrive? every time i start to install it it says system memory is low so I am assuming it is still trying to install it on the laptop.

When you install, change the install directory to your flash drive. When you want to run bitcoin core, you will need to start it with the
Option where <path to data folder> is the path to the folder on your flash drive where you want the data to be stored. The data is the blockchain, databases, and the wallet file.

Is there a particular reason you want the entire blockchain downloaded? You can just use a SPV wallet like Multibit HD and you wont need to download the blockchain then. There's several options on bitcoin.org;
https://bitcoin.org/en/choose-your-wallet

On a USB stick it would be even more excruciatingly long to do and sync and use ongoingly.

Simply install qtbit on the usbs directory path. Then run it and wait for it to sink. Do you want it on your usb so you can run it where ever you want ?
Or to strengthen the blockchain.

Bullshit. The data directory is not the same as the install directory.

Hey, can you tell me how to install as i am also thinking of going for it in to install in flash drive, can you help me also in installing the blockchain in a flash drive.

Its going to be too slow. Install it to a USB 3.0 HDD/SSD if you really must have a portable copy of the blockchain, which make no sense at all, because you dont need the blockchain unless you want to run a node, which you can't do on a mobile setup.

See the post by knightdk. If you only want to move the datadir, use the --datadir=/path/to/flashdrive command.