Disc Management SC - can't find my external HDD:    My Computer SC -  can't access my external HDD:    Attached above are the screenshots showing how i can't access the files i have on my external HDD. It was still working perfectly fine yesterday but i was unable to access it today. What should i do to atleast fix the external HDD or recover the file?   Thanks
What steps can I take to try to recover lost or inaccessible data from any storage device?  Answers:   This applies to any computer storage device, e.g. internal/external hard drives, USB sticks, flash memory. The most important thing is to STOP using it, any type of I/O can ruin your chances of a recovery.     We have separate questions covering common problems with USB flash drives in greater detail:
Give a deduction of $\forall y \exists x (x=y)$  My thinking is I can prove $\exists x(x=y)$ then use generalization theorem， which is equivalent to prove $\neg \forall x \neg (x=y)$ but I got stuck proving this... thanks in advance  Sorry that I did not specify what deduction system that I want to use here, it is the deduction sequence  where ai is either Axiom or original hypothesis or obtained from MP Why is Harry Potter a half-blood? Is there an example of a ring $S$ with identity $1_S$ containing a non-trivial subring $R$ which itself has an identity $1_R$, but $1_R\neq 1_S$ (or equivalently $1_S\notin R$). I'd also like to know under what conditions the identities have to be equal. I know they must be equal if $S$ has no zero divisors, since for every $r\in R$ we have $(1_S-1_R)r=0$  In other words: Is the category of unital rings with identity-preserving morphisms a full subcategory of the category of rings (where morphism are only required to respect addition and multiplication)? What apps are people using to record voice meetings on the iPad? Kill a blocker with an instant - is it still blocking? We are in the combat phase:   I declared my attackers  My opponent declared his blockers, stating which attackers he was blocking I cast an instant, which automatically kills his blocker. There is nothing blocking my attacker now   Now we're in the damage phase. I said that my attacker now does damage and  reduces my opponent's hit points. My opponent said that because my attacker was blocked no damage could be done. I pointed out that the blocker was destroyed before the damage phase, so therefore he wasn't blocking, but he wasn't having it. (My attacker does not have trample)  Is this covered by a specific section in the rules? Continuous bijection from $(a,b) \to S^1$? C++ deleting line of text in a file What if the hard disk is partitioned into more than 26 sections in Windows? Reading input from text file to array in c++ Reference template variable within Jinja expression Book recommendation on plane Euclidean geometry I consider myself relatively good at math, though I don't know it at a high level (yet). One of my problems is that I'm not very comfortable with geometry, unlike algebra, or to restate, I'm much more comfortable with algebra than geometry. I think that's mainly because my geometry education was sparse through the years, lacking in consistency etc. So I'd like to revise (and learn more) all at once, catching the basic axioms, understanding why such is such, etc. Essentially, a moderately rigorous textbook in plain Euclidean geometry (nothing fancy). Please don't say "The Elements" - I have browsed it at the bookstore, it is quite good, but not really what I'm looking for right now. Android "M" was officially announced on at the Google I/O conference on May 28, 2015 and revealed to be 6.0 Marshmallow on August 17, 2015.  You can review the high-level changes at the  and the announcement on the official .  Of course, not all devices will get this update right away and others won't get it at all. Each manufacturer and carrier often choose to add their custom modifications which tend to delay the official release.  When will each device get Android 6.0, either officially or unofficially, if ever?  See also: Principal component analysis (PCA) is usually explained via an eigen-decomposition of the covariance matrix. However, it can also be performed via singular value decomposition (SVD) of the data matrix $\mathbf X$. How does it work? What is the connection between these two approaches? What is the relationship between SVD and PCA?  Or in other words, how to use SVD of the data matrix to perform dimensionality reduction? The Windows 8 version of Google Chrome seems to have been updated to support the UI formerly known as Metro.  However, this seems to be the only option now, which means that I can no longer use Chrome on my netbook.  How do I get Google chrome to work in classic desktop mode on Windows 8?  Thanks Biblatex authoryear dashed for entries with no year I'm using biblatex authoryear and have multiple entries of the same author that do not have a year. When I cite them there are letters shown to distinguish them:   But in the bibliography those letters are not shown and you can only distinguish them by the title. Is it possible to show the letters in the bibliography, too?  \documentclass[a4paper,12pt]{article}% \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{filecontents} \begin{filecontents}{bib.bib} @BOOK{bar1,   title = {Text One},   year = {},   author = {Firstname Lastname}, } @BOOK{bar2,   title = {Text Two},   year = {},   author = {Firstname Lastname}, } \end{filecontents}  \usepackage[backend=biber, style=authoryear-icomp, dashed=true]{biblatex} \addbibresource{bib.bib}  \begin{document}  \cite{bar1} and \cite{bar2}  \printbibliography \end{document} Prove that $||x|-|y||\le |x-y|$ I've seen the full proof of the Triangle Inequality  \begin{equation*} |x+y|\le|x|+|y|.  \end{equation*} However, I haven't seen the proof of the reverse triangle inequality:  \begin{equation*} ||x|-|y||\le|x-y|. \end{equation*} Would you please prove this using only the Triangle Inequality above?  Thank you very much. Uncertainty in parenthesis Is it possible to extend an Indian business visa from India? I'm an Egyptian girl from Cairo. I'm planning a six-month trip to India in December for training purposes, but getting a six-month visa is so hard from my country.  If I can only get 3 months instead of 6 months, is it possible to extend the business visa in India? iPhone 7 Plus takes days to turn on showing Apple logo or black screen I’ve had this issue for months but in the last couple of days it’s got very very bad.  When my phone runs out of battery it needs like 2–3 days to turn back on. At the beginning of this problem the phone would need about 1h. Every time when my phone goes off again the time to switching on goes up.  What does this all look like? Well, when my phone died I put it on the charger, then the logo appears and goes off. When it goes off, a black screen pops out with a little white line on in it, then it turns on back to Apple logo. It keeps doing this until it turns on which is 1 or 2 even now 3 days.  I tried to restore it and also update it but nothing happens, literally nothing happened. PHP "header (location)" inside IFRAME, to load in _top location?