External Microphone Static at Certain Intervals

Hello,
I've had a Sennheiser PC-151 for a few months now, and whenever I record in Quicktime with the microphone, about 2 minutes of straight static/echoing occur. This usually happens at about an hour and nine minutes in, and from there occurs every hour afterward. I've searched a couple of forums and found that a lot of people have had similar problems. The solution I kept seeing was to go into Audio MIDI and change the clocking/add an aggregate device, which I did, but nothing changed. To give some specs, the microphone is on a headset which has a 3.5mm stereo jack. I have that attached to a USB adapter. At first I thought that the static came from the time machine backing up, as it happened every hour, but it still occurred even after I turned off Time Machine.
Any advice would be greatly appreciated.
Thanks!

Sorry, if I did confuse you with the wrong words that I used!
  I am aware of DropBox, sure its a correct answer and very user geared, but for those in only one location such as Japan, North America, Europe etc. I should have mentioned, that I neeeeed to use it incl. in China.
As someone who is often in China, DropBox has some drawbacks .i.e. either its shut down, or takes ages until you can access or just in the middle of a up / download it keeps crashing...
I thought I found a way around this blockage, by using foreign proxies while being in China it worked well until recently. But on my recent trip to China out of 10 attempts, on 8 I couldnt access the site with any reliable overseas proxies that I had!
I found NetDisk which seems to work well and very userfriendly, but I do wonder for how long! To avoid any troubles I had to start to upload my important files / docs into my yahoo email account as draft's. Yahoo has functionality limitations because, they can not be indexed or organized in a user-friedly way. It sometimes also not possible to access Gmail, which in fact has better ways to organize files / folders but because of access issues I dont use it for file related issues! 
Anyone, facing similar issues...!   

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