Xender was previously known as Flash Share and for a long time now, has been the best way to transfer files between android devices.
Xender utilizes Wi-Fi technology which makes file transfer between devices very fast when compared to Bluetooth. With Xender you can transfer a large file within minutes.
A blog post that was published on Microsoft Lumia Conversations which confirmed this reads:
Typically, sending a file from one device to another involves email, Bluetooth, or SMS, which can be slow if your files are large.
Instead, the cross-platform file-transfer app Xender uses Wi-Fi to send files to other devices. Provided that all devices have Xender installed and are connected to the same Wi-Fi network, you can send locally stored photos, videos, files, and music, as well as searches from other apps such as OneDrive to another device.
Now, why would you use Xender if you already use the cloud-storage app OneDrive? Xender could be helpful if you just want to share just one large file quickly and directly to a friend’s phone, for example.
How fast is Xender? To give you an idea of the transfer speeds that can be achieved, we’ve performed a very unscientific test using a stopwatch.
To compare, here’s how long it took me to send a photo from one Lumia to another via Bluetooth:
One photo, 9.81 MB = 2 min, 15 seconds
Using Xender to send the same photo between the same devices:
One photo, 9.81 MB = 12 seconds
There are no file size restrictions for Xender. Regardless of whether the file is 1 MB or 5 GB, the app can send it as long as the recipient has the available resources to receive it.
Xender is free to download, so head over to the Windows Phone Store to install.
Here is what Xender looks like on Windows phones:
Though not tested, but I believe that you can also use it to transfer file between Windows phones and other OS that support Xender such as Android.